JP2008295177A - Manufacturing method of laminated core, laminated core, and edgewise pressure generation mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a laminated core which can accurately laminate plate piece cores punched into prescribed shapes, can obtain the laminated core which is high in accuracy, and further can obtain a motor which is high in efficiency and high in accuracy. <P>SOLUTION: The manufacturing method of the laminated core manufactures the laminated core 220 by sequentially inserting a plurality of plate piece cores 201 formed of metal plates and having arc-shaped external peripheries and internal peripheries between a plurality of pressurizing pieces arranged in the edgewise pressure generation mechanism 200 for pressing the plate piece cores from a sideway and aligning them, and by laminating them. In the method, recesses 206 recessed into the central direction in substantially V shapes along the radial direction of the arc are formed at the external peripheries of the plate piece cores 201. The two pressurizing pieces of the external periphery pressing pressurizing piece 202 and the internal periphery pressing pressurizing piece 103 are arranged as the plurality of pressurizing pieces, substantially V-shaped protrusions 205 engaged with the recesses 206 of the plate core pieces 201 are formed at the external periphery pressing pressurizing piece 202, and the plate piece cores 201 are laminated in a state that the protrusion 205 are inserted into the recesses 206. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a laminated core obtained by laminating a core (referred to as a plate piece core) punched into a predetermined shape from a metal plate, which is used for a motor core.

Conventionally, laminated cores for motors have been manufactured by stacking plate cores formed by punching metal plates into a predetermined shape in the thickness direction.
FIG. 9 is a front view of a conventional plate core (also serves as a front view of a laminated core). As shown in FIG. 9, the plate core 101 is substantially T-shaped when viewed from the front, and has an outer periphery 101a that bulges in an arc shape having a radius R1, and an arc shape that is concentric with the arc of the outer periphery 101a. An inner periphery 101b that is concentric with the arc of the outer periphery 101a and has a radius R2 smaller than the radius R1 of the arc of the outer periphery 101a and is recessed in an arc shape, and further from both ends of the outer periphery 101a to the outer periphery 101a From the vicinity of the outer peripheral left side portion 101c and the outer peripheral right side portion 101d extending toward the inner peripheral side (the arc center side) along the radial direction of the circular arc, and the vicinity of both ends of the inner peripheral portion 101b, It also has a left side portion 101e near the inner periphery and a right side portion 101f near the inner periphery that extend to the outer peripheral side substantially in parallel with the line a connecting the midpoint.

  After the plate cores 101 are stacked and configured as a laminated core 120 for a motor, as shown in FIG. 10, the laminated cores 120 for a motor are combined in an arc shape to form a single motor component 140. As described above, a convex portion 121 and a concave portion 122 for connecting adjacent laminated cores 120 are formed on the left side portion 101c and the right side portion 101d near the outer periphery of the laminated core 120 (plate piece core 101). Yes.

  Although not shown, as a joining method for joining the plate cores 101 to each other, a protrusion is formed on the plate core 101, and a convex portion and a concave shape formed when the protrusion is formed. A method of caulking the parts to each other (for example, Patent Document 1), a method of laminating the plate cores 101 and laminating between the plate thicknesses of the cut surfaces punched out and the plate thickness, A method of joining the plate cores 101 with an adhesive is used.

Below, the manufacturing method of the conventional laminated core is demonstrated, referring FIGS.
FIG. 11 shows a process of manufacturing a conventional laminated core, more specifically, punching a plate core from a metal plate and aligning and joining the plate cores in a side pressure generating mechanism described later to produce a laminated core as a laminate. FIG. 12 is a front view schematically showing a side pressure generating mechanism used in a conventional method for manufacturing a laminated core, and FIG. 13 is a side view showing the side pressure generating mechanism in the direction of the line XIII-XIII in FIG. It is the arrow side view seen from.

  As shown in FIG. 11, first, a metal plate 115, which is a material of the plate core 101, is intermittently conveyed into a punch press apparatus having a punch 113, a die 116, and the like for punching to perform a punching operation. A plate core 101 punched into a predetermined shape as shown in FIG. 9 is formed. In FIG. 11, 110 is an upper die set, 111 is a punch plate, 112 is a stripper plate, 117 is a die plate, 118 is a die packing plate, and 119 is a lower die set. Further, when the plate core 101 is caulked and joined, the metal plate 115 is formed with a caulking projection in advance, and when joined with an adhesive, the adhesive is pre-applied, and When joining by laser welding, pre-processing is not performed in particular.

  The plate core 101 punched out by the punch 113 is pushed into the die 116. Each time the newly punched plate core 101 is pushed into the die 116, the already punched plate core 101 is sequentially moved downward into the lateral pressure generating mechanism 100 installed below the die 116. Inserted. Here, the side pressure generating mechanism 100 is provided to apply a side pressure to the plate core 101 and to stack the plate core 101 while positioning and aligning the plate core 101.

  As shown in FIGS. 12 and 13, the conventional side pressure generating mechanism 100 has an inner periphery 101 a, an outer periphery 101 b, and left and right sides 101 e, 101 f (inner periphery) of the plate core 101 by pressurizing pieces 102 to 105 described later. It is configured to apply pressure toward the center of the plate core 101 from the four side surfaces (cut surfaces cut by the punching operation) in the four directions of the left and right sides (see FIG. 9). Here, reference numeral 107 in FIGS. 12 and 13 denotes a block forming a frame portion of the side pressure generating mechanism 100. The outer periphery 101a of the plate core 101 is added to the block 107 from the side by an elastic body 106 such as a spring. The pressing piece 102 for pressing, the pressing piece 103 for pressing the cut surface of the inner periphery 101b of the plate core 101 from the side, and the left and right sides 101e and 101f of the plate core 101 are similarly applied from the side. Pressurizing pieces 104 and 105 to be pressed are slidably installed. Therefore, the plate core 101 inserted into the block 107 is connected to each side 101a of the plate core 101 by the pressure pieces 102 to 105 from the four directions of the inner and outer peripheral sides and the left and right sides in the lateral pressure generating mechanism 100. 101b, 101e, and 101f are stacked in the thickness direction while being aligned, and at the same time, each of the plate cores 101 is pressed and adhered by the pressing force of the punch 113 from above. The In this case, if the plate core 101 has a projection formed by the pressure adhesion, the concave portion and the convex portion of the projection are caulked and fixed, and if laser welding is used, the plate thickness and the plate thickness In the case of the plate core 101 to which welding is applied by laser welding, and the adhesive is applied, the plate core 101 is bonded. The stacking accuracy at that time is determined in the state of the pressure pieces 102 to 105 pressing the side surface of the plate core 101 from four directions.

  As shown in FIGS. 9 and 10, the laminated core 120 obtained by laminating the plate cores 101 is formed on the laminated core 120 adjacent to the convex portion 121 formed on the laminated core 120. In a state where the recessed portion 122 is fitted, it is combined in an annular shape to form one motor component 140. Although not shown, the outer periphery of the laminated core 120 combined in an annular shape is fitted to a frame disposed on the outer periphery side of the component 140, and a rotating motor shaft is disposed on the inner periphery of the component 140. . The inner periphery of the frame and the outer periphery of the laminated core 120 are more firmly fixed to form a motor core as the contact area is larger. The smaller the gap between the inner periphery of the laminated core 120 and the outer periphery of the motor shaft is, the smaller the motor is. There is little shakiness of the shaft, and the shaft rotates smoothly.

  However, in the laminated core 120 having the above-described conventional configuration, when the plate cores 101 are laminated with being shifted in the thickness direction, an inclined laminated core 120 is formed as shown in FIG. When a plurality of laminated cores 120 are combined in an arc shape, the outer peripheral part and the inner peripheral part of the laminated core 120 are inclined. If it is fitted to the frame in this state, it will not fit well, and if the motor shaft is inserted into the inner periphery, the shaft will tilt or the laminated core 120 will come into contact with the shaft, reducing efficiency. Or motor vibration, rattling, and noise. Therefore, it is very important to accurately stack the plate cores 101 without shifting each other.

In order to prevent such a situation from occurring, the above-described lateral pressure generating mechanism 100 is provided in order to stack the plate cores 101 accurately without shifting, and pressure is applied to the side surfaces of the stacked plate cores 101 from four directions. It is supposed to be applied. That is, by applying pressure from the side surfaces of the outer periphery 101a and the inner periphery 101b of the plate core 101, the position in the inner and outer peripheral directions of the plate core 101 is regulated, and pressure is applied from the side surfaces of the left and right sides 101e and 101f. Therefore, the position in the left-right direction is regulated.
JP 2000-125519 A

  However, according to the laminated core 120 and the side pressure generating mechanism 100 having the above-described conventional configuration, the structure is such that pressure is applied from the side surfaces of the outer periphery 101a and the inner periphery 101b of the plate core 101, and the outer periphery 101a and the inner periphery 101b. Because of the circular arc shape, not only the inner and outer peripheral directions of the plate core 101 but also the left and right positions are restricted to some extent. When pressure is applied from the left and right in this state, if the pressure balance is poor, the center positions 102a and 103a of the left and right shape of the pressure pieces 102 and 103 on the inner and outer circumferences, and the plate core 101, as shown in FIG. There may be a shift in the center position 101t regarding the left and right shape. Here, FIG. 15 shows a state in which pressure is applied to the plate piece core 101 by the pressure pieces 102 to 105. At this time, for example, when the pressing force of the pressure piece 105 from the right side is strong, the plate core 101 is moved to the left side by the pressure, and the pressing force from above and below is weaker than the pressing force from the right side. The pressure piece 102 on the outer peripheral side is moved upward, the pressure piece 103 on the inner peripheral side is moved downward, the arc surfaces of the inner and outer peripheral edges 101a and 101b of the plate core 101, and the pressure pieces 102 and 103 The center of the shape of the plate core 101 and the center of the shape of the pressurizing pieces 102 and 103 were shifted, and the lamination accuracy of the plate core 101 was deteriorated due to the influence. Therefore, despite the fact that the lateral pressure generating mechanism 100 is provided for good alignment, the function is not fully exhibited, and the plate core 101 is laminated obliquely as shown in FIG. It was happening.

  The present invention solves the above-mentioned conventional problems, and can laminate a plate core punched into a predetermined shape with high accuracy, and can obtain a highly accurate laminated core and, in turn, an efficient and highly accurate motor. An object of the present invention is to provide a core manufacturing method, a laminated core, and a lateral pressure generating mechanism.

  In order to solve the above-mentioned problem, the laminated core manufacturing method of the present invention comprises a plurality of plate cores made of a metal plate having an arc-shaped outer periphery and an arc-shaped inner periphery concentric with the outer peripheral arc. A laminated core manufacturing method for manufacturing a laminated core by sequentially inserting and laminating between a plurality of pressure pieces provided in a side pressure generating mechanism that presses and aligns the plate core from the side, At least one of the outer periphery and the inner periphery of the plate core is formed with a recessed portion having a substantially V shape in the central direction along the radial direction of the arc, Two pressure pieces: a pressure piece for pressing the outer periphery that contacts the periphery and pressing from the side, and a pressure piece for pressing the inner periphery that contacts the inner periphery of the plate core and presses from the side A pressure piece for pressing the outer periphery or the inner periphery A pressing piece for pressing is formed with a substantially V-shaped protrusion that fits into the substantially V-shaped depression of the plate core, and the pressing piece for pressing the outer periphery and the pressing member for pressing the inner periphery. With the pressure piece, the substantially V-shaped protrusion formed on the pressure piece for pressing the outer periphery or the pressure piece for pressing the inner periphery is inserted into the substantially V-shaped depression of the plate core. The plate cores are stacked while pressing the plate cores from both sides.

  Further, the laminated core of the present invention is a laminated core obtained by laminating plate-shaped cores made of metal plates having an arc-shaped outer periphery and an arc-shaped inner periphery concentric with the outer peripheral arc, A recess having a substantially V shape is formed in at least one of the outer periphery and the inner periphery of the plate core in a direction along the radial direction of the arc.

  Further, the lateral pressure generating mechanism of the present invention is a lateral pressure generating mechanism that presses and aligns the plate cores of the laminated core from the side, and presses the outer periphery of the plate core and presses it from the side. A pressure piece for inner periphery pressing and a pressure piece for inner peripheral pressing that presses from the side in contact with the inner periphery of the plate piece core. A substantially V-shaped protrusion that fits into a substantially V-shaped depression formed on the outer periphery is formed.

  According to the above method and configuration, since the pressure is applied from two directions (two pressure pieces) on the inner peripheral side and the outer peripheral side, position regulation is easy, and at the same time, the outer periphery or inner periphery of the plate core Since a substantially V-shaped depression that enters a substantially V-shape in a direction along the radial direction of the arc is formed in the periphery, and a protrusion corresponding to the depression is formed on the pressure piece, When the piece core is inserted between the pressure pieces of the side pressure generating mechanism and the position is regulated, the protrusion of the pressure piece and the substantially V-shaped depression of the plate piece core are fitted to each other, and the inclination of the depression The surface and the inclined surface of the protrusion of the pressure piece are in surface contact, the position of the plate core in the rotation direction is also well regulated, and the laminated core can be manufactured in a good posture. Moreover, since the shape of the dent and the protrusion is substantially V-shaped, even if the shape of the plate core changes slightly, the inclination of the V-shaped inclined surface of the dent of the plate core and the protrusion of the pressure piece The surface always contacts, and the position regulation of the plate core is ensured.

  When the plate core is not so large, if only one recess is formed in the center of the arc around the outer periphery of the plate core, the arc-shaped outer periphery of the plate core and the pressure piece This is preferable because the contact area with the corresponding arc portion can be made relatively large.

  In addition, when the plate core is large to some extent, by forming two hollow portions formed on the outer periphery of the plate core, the rotation direction of the plate core is more restricted than when only one hollow portion is provided. Can be improved and effective.

  Further, the maximum depth of the hollow portion of the plate core is equal to or greater than the plate thickness dimension of the plate core, and 0.1 × R1 or less when the radius of the arc around the plate core is R1. By forming in this way, it is possible to prevent the plate core from being deformed even when the plate core is pressed by the pressure piece.

  In addition, when a substantially V-shaped protrusion formed on the pressing piece for pressing the outer periphery is inserted into the recess of the plate core, a gap is formed from the bottom of the recess. By forming, even if the punching shape of the plate core changes, the inclined surfaces of the plate core and the pressure piece can be brought into surface contact with each other, and the reliability is improved.

  As described above, according to the present invention, only the two locations on the inner periphery or the outer periphery of the plate core are regulated by the pressure piece, and the recessed portion formed on the outer periphery or the inner periphery of the plate core. Is held in a state where the protrusion of the pressure piece is inserted, it is possible to prevent misalignment when laminating, and to obtain a laminated core with good lamination accuracy with no deviation between the plate cores. it can.

  Since the laminated core of the present invention has no deviation between the plate cores and has very good lamination accuracy, the component assembly accuracy as a motor is improved, and a motor with high efficiency and performance can be manufactured.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a plate core according to an embodiment of the present invention (when viewed from the front, the plate core and the laminated core have the same shape, and thus also serves as a front view of the laminated core). 2 is a simplified side view of the laminated core, and FIG. 3 is a front view showing a component in which a plurality of laminated cores are combined into an annular shape. In addition, the same code | symbol is attached | subjected to the component of the function similar to the conventional board piece core, a lamination | stacking core, and a side pressure generating mechanism.

  1 and 2, reference numeral 201 denotes a plate core made of a thin metal plate formed by punching a metal plate 115 (see FIG. 3) into a predetermined shape, and 220 denotes a plurality of plate cores 201 in the thickness direction. It is a laminated core formed by laminating sheets. As shown in FIG. 1, the plate core 201 has an outer periphery 201a (side shown in FIG. 1) bulging in an arc shape having a radius R1, and an arc shape concentric with the arc of the outer periphery 201a. And an inner periphery 201b (side shown in the lower side in FIG. 1) which is concentric with the arc of the outer periphery 201a and is recessed in an arc shape having a radius R2 smaller than R1. The plate core 201 is substantially T-shaped when viewed from the front, and includes the outer periphery 201a and the inner periphery 201b, and from both ends of the outer periphery 201a toward the inner periphery along the radial direction of the arc of the outer periphery 201a. The inner circumference extending from the extending outer peripheral left side 201c and the outer peripheral right side 201d, or the vicinity of both ends of the inner peripheral 201b to the outer peripheral side substantially parallel to the line a connecting the outer peripheral midpoint and the inner peripheral midpoint. It also has a left side portion 201e and a right side portion 201f near the inner periphery.

  Here, the laminated core 220 of the present invention differs from the conventional plate core 101 and laminated core 120 (see FIG. 9) in the outer peripheral 201a of the plate core 201 in the direction along the radial direction of the arc (that is, A recess 206 is formed in a substantially V shape in the direction of the radius center of the arc from the outer periphery 201a. In this embodiment, the recess 206 is formed in a substantially inverted trapezoidal shape with the V-shaped tip portion omitted.

  Further, the maximum depth of the hollow portion 206 (the dimension from the connecting portion between the hollow portion 206 and the outer periphery 201a to the bottom surface portion of the hollow portion 206) h1 is the plate thickness t of the plate core 201 (see FIG. 2). When the radius of the arc around the outer periphery of the plate core 201 is R1, it is 0.1 × R1 or less (10% or less of the radius R1). That is, the recess 206 is within the dimensional range from the same dimension as the thickness t of the metal plate 115 of the plate core 201 to 10% of the radius R1 of the outer periphery 201a, and is more central than the arc line along the outer periphery 201a. It is formed in a V-shape that penetrates the part direction.

  In this embodiment, only one recess 206 is formed at the center in the circumferential direction of the arc on the outer periphery 201a, and the midpoint of the arc formed along the outer periphery 201a and the midpoint of the arc of the inner periphery 201b. An arrangement where there is an intersection point b where the extended lines of the first side 206a and the second side 206b of the V-shaped depression 206 intersect each other exists on the line a connecting the two (that is, the center line of the depression 206 is the line a) overlapping with a).

  The plate cores 201 are stacked as shown in FIG. 2 to form a laminated core 220 for a motor. Then, as shown in FIG. 3, the laminated cores 220 for a motor are annularly formed. It is configured to be combined into one motor part 240. And the convex part 121 and the recessed part 122 for connecting adjacent laminated cores 120 are formed in the outer peripheral side left side part 201c and outer peripheral side right side part 201d of the laminated core 220 (plate piece core 201). In a state where the convex portions 121 and the concave portions 122 of the adjacent laminated cores 220 are fitted together, they are combined in an annular shape to form one motor component 240.

  FIG. 4 shows one step of the method of manufacturing the laminated core according to the present embodiment (specifically, the plate cores are punched from a metal plate, and the plate cores are aligned and joined in a side pressure generating mechanism described later. FIG. 5 is a front view schematically showing a side pressure generating mechanism used in the method for manufacturing the laminated core, and FIG. 6 is a diagram showing the side pressure generating mechanism. It is the arrow side view seen from the VI-VI line direction of 5.

  As shown in FIG. 3, as a device for manufacturing the laminated core 220, a punch 113 for punching, a die 116, and the like for punching a metal plate 115 that is a material of the plate core 201 to form the plate core 201, etc. Is provided. In addition to the punch 113 and the die 116, the punch press apparatus includes an upper die set 110 and a punch plate 111 that include a stripper plate 112, a die plate 117, a die packing plate 118, and a lower die set 119, and a laminated core 220. A side pressure generating mechanism 200 for pressing and aligning the plate cores 201 from the side is provided in the lower die set 119.

  Here, in this side pressure generation mechanism 200 (see FIG. 12), the four pressure pieces 102, 103, 104, 105 are used to cut the inner and outer periphery of the plate core 101 and the cut surfaces in the four directions on the left and right sides as in the prior art. Instead of applying pressure from the side surface, as shown in FIG. 5, the two pressure pieces 202 and 103 are used to apply pressure only in two directions around the inside and outside of the plate core 201. That is, the outer peripheral pressing pressure piece 202 that contacts the outer periphery 201 a of the plate core 201 and presses from the side (outer peripheral side), and the inner periphery 201 b of the plate core 201 contacts the side (inner side). There are only two pressure pieces 202 and 103, which are the inner peripheral pressure pieces 103 pressed from the peripheral side), and these pressure pieces 202 and 103 are processed and formed in the central portion of the block 203. The holes are fitted into the holes, and are urged in a state where the position is restricted by being pressed by an elastic body 106 such as a spring.

  Further, the arc shape of the inner and outer peripheries 201b and 201a of the plate core 201 and the arc shape of the pressurizing pieces 103 and 202 coincide with each other. The position in the left-right direction (because it is a circular arc shape, force is also applied in the left-right direction) is restricted. However, it is not possible to restrict the position of the plate core 201 in the direction that becomes the rotational direction when seen in a plan view only by using the pressure pieces 102 and 103 having the same shape as the conventional one. Therefore, in the lateral pressure generating mechanism 200 of the present invention, the pressurizing piece 202 that presses the outer periphery 201a of the plate core 201 is fitted into the substantially V-shaped depression 206 formed on the outer periphery 201a of the plate core 201. A substantially V-shaped projecting portion 205 is formed, and the projecting portion 205 is also configured to restrict the position of the plate core 201 (laminated core 220) in the rotational direction.

  As shown in FIGS. 1 and 7, the protrusion height of the protrusion 205 of the pressure piece 202 is higher than the depth h1 of the substantially V-shaped recess 206 formed in the outer periphery 201a of the plate core 201. Even when the protrusion 205 of the pressure piece 202 is most fitted into the recess 206 of the plate core 201, the tip of the protrusion 205 of the pressure piece 202 and the plate are formed so that the length h2 is slightly reduced. A gap is formed between the tip portion of the hollow portion 206 of the single core 201. That is, with this configuration, even when the shape of the plate core 201 or the pressure piece 202 changes slightly due to long-term use or the like, the inclined surfaces (the first side 206a and the second side 206b) of the recessed portion 206 of the plate core 201 are obtained. ) And the inclined surface of the protrusion 205 of the pressure piece 202 can be surely brought into surface contact.

  Further, in order to evenly distribute the force restricting the plate core 201 in the inner and outer peripheral directions, the force restricting in the left-right direction, and the force restricting in the rotating direction, as shown in FIG. It is optimal to set the opening angle θ of the protrusion 205 to about 90 degrees, but the present invention is not necessarily limited to this.

  A method for manufacturing the laminated core 220 having the above configuration (a laminating process including a process of forming (punching) the plate core 201) will be described. In addition, before performing this lamination process, the following pretreatment is performed in advance. That is, when the laminated core 220 is manufactured by caulking and joining the plate cores 201 with the projections processed into the metal material 115, the caulking projections are formed on the metal material 115 in the previous step, and the adhesive When the plate cores 201 are bonded and bonded together, an adhesive is applied to the metal material 115 in the previous step.

  First, a metal plate 115 that is a material of the plate core 201 is intermittently conveyed into a punch press apparatus provided with a punch 113 for punching, a die 116, and the like to perform a punching operation, and as shown in FIG. A plate core 201 is formed by punching into the shape. The punched plate core 201 is pushed into the die 116 by the punch 113 for shape removal, and then the metal material 115 is intermittently sent to punch the next plate core 201. Each time the newly punched plate core 201 is pushed into the die 116, the already punched plate core 201 is sequentially moved downward to apply the lateral pressure generating mechanism 200 installed below the die 116. The pressure pieces 202 and 103 are inserted.

  Here, the shape of the pressing surface of the pressure piece 103 that presses the inner periphery 201b of the plate core 201 is the same arc shape as the shape of the inner periphery 201b of the plate core 201. Therefore, the pressurizing piece 103 comes into close contact with the inner peripheral cutting surface of the plate core. Further, the shape of the pressing surface of the pressure piece 202 that presses the outer periphery 201a of the plate core 201 (the arc-shaped portion and the portion of the protrusion 205) is the same as the shape of the outer periphery 201a of the plate core 201. The pressing piece 202 is also pushed in a state of being in close contact with the outer peripheral side surface of the plate core 201. The pressurizing pieces 103 and 202 are arranged so as to be pressed toward the plate core 201 by an elastic body 106 such as a spring, and in the state where the plate core 201 is not yet accommodated, The interval (space) between 202 is set to be slightly smaller than the shape dimension of the punched plate core 201. Therefore, when the plate core 201 is pushed, a frictional force is generated between the side surfaces of the pressure pieces 103 and 202 and the side surfaces of the inner and outer peripheral portions 201b and 201a of the plate piece core 201. The plate cores 201 are brought into close contact with each other by the pressing force from above by the shape punch 113. At this time, if the strength of the elastic body 106 such as a spring serving as a pressure source for generating the frictional force is increased, the frictional force increases, so that the contact pressure between the plate cores 201 also increases.

  When the caulking projections are processed on the plate core 201, the plate cores 201 are in close contact with each other so that the concave portion processed into the plate core 201 and the overlapped plate core 201 are processed. The raised cores are fitted and fixed by caulking to obtain a laminated core 220 that is a laminated body in which the plate cores 201 are laminated. In the case where an adhesive is applied to the plate core 201, the plate cores 201 are bonded and bonded to each other when the plate cores 201 are brought into close contact with each other to obtain a laminated core 220 that is a laminate.

  According to the present invention, the outer periphery 201a of the plate core 201 is formed with the substantially V-shaped depression 206 that enters the substantially V shape in the direction along the radial direction of the arc. When 201 is inserted between the pressure pieces 202 and 103 of the side pressure generating mechanism 200 and the position of the plate core 201 in the vertical and horizontal directions is restricted by the pressure pieces 103 and 202, the pressure piece 202 is further increased. The projection 205 and the substantially V-shaped depression 206 formed on the outer periphery 201a of the plate core 201 are fitted to each other, and the inclined surface (first side 206a and second side 206b) of the depression 206 is added. By the surface contact with the inclined surface of the protrusion 205 of the pressure piece 202, the position of the plate core 201 in the rotational direction is also well regulated.

  As described above, when pressure is applied from the two directions of the inner peripheral side and the outer peripheral side in this way, position regulation is easy, and a substantially V-shaped depression 206 is formed in the outer periphery 201a of the plate core 201. In addition, since the pressing piece 202 that presses the outer periphery 201a of the plate core 201 is formed with a substantially V-shaped protrusion 205 that fits into the recess 206, when the plate core 201 is fitted, The position in the rotation direction can also be well regulated. As a result, the laminated core 220 can be satisfactorily manufactured by accurately laminating the plate cores 201.

  Here, the V-shape as shown in FIGS. 1 and 7 is appropriate as the shape of the recess 206 set in the plate core 201. The plate core 201 is punched into a predetermined shape by the punch 113 for punching and the die 116. When the punch 113 and the die 116 are worn out, the punching shape of the plate core 201 is changed. If the recess 206 is formed in an arc shape instead of a V shape, the recess 206 is installed in the plate core 201 due to the influence, and the recess 206 of the plate core 201 formed in the pressure piece 202 is affected. The shape of the projecting portions 205 that do not match each other, and a gap is generated between these arc-shaped surfaces to cause a deviation, which makes it difficult to regulate the position of the plate core 201. Further, when the plate cores 201 are bonded and bonded with a thermosetting adhesive, the plate cores 201 are heated, but the plate cores 201 and the pressure pieces 202 are thermally expanded due to the influence of the heat, Due to the difference in the degree of thermal expansion, the fitting state of the unevenness between the plate core 201 and the pressure piece 202 becomes worse, and the position regulation becomes difficult. On the other hand, if the shape of the hollow part 206 installed in the plate piece core 201 is V-shaped, even if the shape of the plate piece core 201 changes, the V-shaped inclined surface of the hollow part 206 of the plate piece core 201 ( Since the first side 206a and the second side 206b) and the inclined surface of the protrusion 205 of the pressure piece 202 are always in contact, the position regulation of the plate core 201 is ensured.

  In this case, a gap is provided between the tip of the substantially V-shaped depression 206 provided on the plate core 201 and the tip of the substantially V-shaped protrusion 205 of the pressure piece 202. Moreover, even if the punching shape of the plate core 201 changes due to long-term use or the like due to the formation of the depression 206 or the protrusion 205, the tip of the depression 206 of the plate core 201 and the pressure piece 202 can be prevented from forming a gap between the inclined surfaces of the plate core 201 and the pressure piece 202 by contacting the tip of the protrusion 205 of the plate 202. The inclined surface can be brought into contact with the surface reliably, and the reliability is improved.

  Further, the maximum depth h1 of the hollow portion 206 along the radial direction from the arc surface along the outer periphery 201a of the substantially V-shaped hollow portion 206 of the plate core 201 is defined as the thickness of the metal plate 115 of the plate core 201. When the plate core 201 is pressed by the pressure piece 202, the plate core 201 is deformed by being within the size range from the same size as t to 10% of the radius R1 of the outer periphery 201a. Can be prevented. That is, when the maximum depth h1 of the substantially V-shaped depression 206 is made shallower than the thickness of the plate core 201, the substantially V-shaped depression 206 of the plate core 201 and the protrusion 205 of the pressure piece 202 Since the contact portion is reduced, the plate core 201 is deformed, and when the maximum depth h1 of the recess 206 is 10% or more of the radius R1 of the outer periphery 201a of the plate core 201, the plate core 201 Since the contact area between the outer periphery 201a and the frame is reduced, the outer periphery 201a of the plate core 201 may be deformed by the fitting pressure between the frame and the outer periphery 201a of the plate core 201. This is not the case with the above configuration.

  Further, as described above, by setting the opening angle θ between the substantially V-shaped hollow portion 206 and the protrusion 205 to about 90 degrees, the force that restricts the plate core 201 in the inner and outer peripheral directions, the right and left directions are restricted. Force and force that regulates in the direction of rotation can be evenly distributed, further improving the reliability.

  As described above, when the laminated core 220 of the present invention is used, there is no deviation between the plate cores 201 of the laminated core 220, and the lamination accuracy is very good, so that the component assembly accuracy as a motor is improved and the efficiency and performance are good. A motor can be manufactured.

  When the shape of the plate core 201 is not so large, as described above, if only one depression 206 is formed at the center of the arc in the outer periphery 201a of the plate core 201, the plate core 201 is formed. This is preferable because the contact area between the arc-shaped outer periphery 201a and the corresponding arc portion of the pressure piece 202 can be made relatively large, but is not limited thereto. For example, when the shape of the plate core 201 is large, the recess 206 formed in the outer periphery 201a of the plate core 201 is formed on the outer periphery 201a of the outer periphery 201a of the plate core 201 as shown in FIG. If two locations are installed so as to be symmetrical with respect to the axis a connecting the midpoint and the midpoint of the inner periphery 201b, the rotation direction of the plate core 201 can be better controlled than in the case of only one location. It is valid.

  In each of the above embodiments, the case where the recess 206 is formed in the outer periphery 201a of the plate core 201 is described in any case, but the present invention is not limited to this, and the inner periphery 201b of the plate core 201 is not limited thereto. The recess 206 may be formed on the outer periphery 201a of the plate core 201, and the recess 206 may be formed on both the outer periphery 201b and the inner periphery 201b of the plate core 201 (however, the outer periphery 201a of the plate core 201). In the case where the depressions 206 are formed in the inner periphery 201b, the position of the depressions 206 of the plate core 201 is not precisely formed, so that the posture of the plate core 201 is shifted. There is a need). Further, as described above, when the recess 206 is formed in the inner periphery 201b of the plate core 201, the distance from the center of the arc of the outer periphery 201a of the plate core 201 and the inner periphery 201b to the recess 206 is reduced. Since the portion 206 is closer to the outer periphery 201 a of the plate core 201 than the plate core 201, the position restriction accuracy of the plate core 201 is disadvantageous. Therefore, the depression 206 is formed on the outer periphery 201 a of the plate core 201. It is preferable to do.

  The laminated core of the present invention can be applied to laminated cores of various motors.

Front view of a plate core according to an embodiment of the present invention (in front view, since the plate core and the laminated core have the same shape, it also serves as a front view of the laminated core) Simplified side view of laminated core according to the same embodiment (drawing plate cores stacked) The front view which shows the components which united the some laminated core which concerns on the same embodiment in the annular | circular shape One step of the manufacturing method of the laminated core according to the embodiment (specifically, the plate core is punched from a metal plate, and the plate core is aligned and joined in a side pressure generating mechanism described later, and the laminated core is laminated. Side view schematically showing the manufacturing process) Front view schematically showing a lateral pressure generating mechanism used in the manufacturing method of the laminated core Side view as seen from the direction of the VI-VI line of FIG. The front view which shows simply the state which is pressing the board core of the laminated core with a pressure piece Front view of plate core (laminated core) according to another embodiment of the present invention Front view of conventional plate core (also serves as front view of laminated core) Front view showing a part in which conventional laminated cores are combined into an annular shape One step of a conventional method of manufacturing a laminated core, specifically, a step of punching a plate core from a metal plate, aligning and joining the plate cores in a lateral pressure generating mechanism described later, and producing a laminated core as a laminate. Side view schematically Front view schematically showing a lateral pressure generating mechanism used in a conventional laminated core manufacturing method Side view of the conventional side pressure generating mechanism as seen from the direction of the XIII-XIII line in FIG. In the conventional side pressure generating mechanism, a front view (plate piece core) schematically showing a state in which a displacement occurs between the pressure piece and the laminated core when the pressure balance from the direction facing the inside and outside and the right and left direction is poor. (Stacked figure) Side view schematically showing a state in which the plate cores are laminated obliquely in the conventional laminated core.

Explanation of symbols

103, 202 Pressurization piece 106 Elastic body 113 Punch 115 Metal plate 116 Die 200 Side pressure generating mechanism 201 Plate piece core 201a Outer periphery 201b Inner periphery 203 Block 205 Protrusion 206 Depression portion 220 Stacked core

Claims (12)

A lateral pressure generating mechanism that aligns a plurality of plate cores made of a metal plate having an arc-shaped outer periphery and an arc-shaped inner periphery concentric with the outer peripheral arc by pressing the plate cores from the side. A laminated core manufacturing method for manufacturing a laminated core by sequentially inserting and laminating between a plurality of provided pressure pieces,
Forming at least one of the outer periphery and the inner periphery of the plate core a recess that enters a substantially V shape in the central direction along the radial direction of the arc;
As the plurality of pressure pieces, a pressure piece for pressing the outer periphery that contacts the outer periphery of the plate core and presses from the side, and an inner periphery that contacts the inner periphery of the plate core and presses from the side Two pressure pieces, including a pressure piece for pressing, are provided.
A substantially V-shaped protrusion that fits into the substantially V-shaped depression of the plate core is formed on the outer peripheral pressing pressure piece or the inner peripheral pressing pressure piece,
A substantially V-shaped protrusion formed on the pressure piece for pressing the outer periphery or the pressure piece for pressing the inner periphery by the pressure piece for pressing the outer periphery and the pressure piece for pressing the inner periphery. A laminated core manufacturing method characterized by laminating a plate core while pressing the plate core from both sides in a state where the plate core is inserted into a substantially V-shaped depression of the plate core.   2. The method for manufacturing a laminated core according to claim 1, wherein the hollow portion is formed at a central portion of the arc in the outer periphery of the plate core.   2. The laminated core according to claim 1, wherein two hollow portions are formed so as to be symmetric about a radial axis passing through a center point of the arc in the outer periphery of the plate core. Manufacturing method.   The maximum depth of the recess is equal to or greater than the plate thickness dimension of the plate core, and 0.1 × R1 or less when the radius of the arc around the plate core is R1. Item 4. The method for producing a laminated core according to any one of Items 1 to 3.   2. When pressing a plate core with a pressure piece, there is a gap between the bottom surface of the recessed portion of the plate core and the tip of the substantially V-shaped protrusion. 5. The method for producing a laminated core according to any one of 4 above. A laminated core obtained by laminating plate cores made of a metal plate, having an arc-shaped outer periphery and an arc-shaped inner periphery concentric with the outer peripheral arc,
A laminated core, wherein a hollow portion having a substantially V shape is formed in at least one of an outer periphery and an inner periphery of the plate core in a central direction along a radial direction of the arc.   The laminated core according to claim 6, wherein the hollow portion is formed at a central portion of the arc around the outer periphery of the plate core.   7. The laminated core according to claim 6, wherein two hollow portions are formed so as to be symmetric about a radial axis passing through the center point of the arc in the outer periphery of the plate core. .   The maximum depth of the recess is equal to or greater than the plate thickness dimension of the plate core, and 0.1 × R1 or less when the radius of the arc around the plate core is R1. Item 10. The laminated core according to any one of Items 6 to 8.   A motor having a motor core formed by combining a plurality of the laminated cores according to any one of claims 6 to 9. A side pressure generating mechanism for pressing and aligning the plate cores of the laminated core according to any one of claims 6 to 9 from the side,
A pressing piece for pressing the outer periphery that contacts the outer periphery of the plate core and presses from the side;
A pressure piece for inner peripheral pressing that presses from the side in contact with the inner periphery of the plate core;
A lateral pressure generating mechanism characterized in that a substantially V-shaped protrusion that fits into a substantially V-shaped depression formed on the outer periphery of the plate core is formed on the pressing piece for pressing the outer periphery. .   The substantially V-shaped protrusion formed on the pressing piece for pressing the outer periphery is formed into a shape in which a gap is formed from the bottom surface of the recess when the tip is inserted into the recess of the plate core. The lateral pressure generating mechanism according to claim 11, wherein

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