JP5570374B2 - Laminate manufacturing method and laminate manufacturing apparatus - Google Patents

Description

  The present invention relates to a laminate manufacturing method and a laminate manufacturing apparatus for manufacturing a laminate by laminating thin plate member segments cut from a thin plate.

  For example, the rotor core of an electric motor is configured in a ring shape (cylindrical shape) by stacking plates made of electromagnetic steel plates formed in a ring shape. As such a rotor core, a rotor core composed of a divided core plate composed of a plurality of fan-shaped plates divided in the circumferential direction is known (see Patent Document 1).

  In the patent document 1, the present applicant has proposed a rotor core laminate manufacturing apparatus that further reduces the stacking time of the split core plate and stacks the split core plate with higher accuracy. According to this rotor core laminated body manufacturing apparatus, when a rotor core is formed by stacking a plurality of divided rotor plates arranged in a ring shape, the divided rotor plates can be more quickly and efficiently and more accurately. It becomes possible to laminate.

  In such a laminate manufacturing apparatus, scrap members are generated when a plurality of divided rotor plates are cut and cut out. The laminated body manufacturing apparatus described in Patent Document 1 is cut into a predetermined size after being discharged to the outside of the laminated body manufacturing apparatus in a state where the generated scrap members are connected.

  Incidentally, it is desired to manufacture a stator core that employs a thin plate (for example, a plate having a thickness of 0.2 mm or less) that is thinner than the thickness of the plate.

International Publication No. 2008/065830

  However, if a thin plate with a thin plate such as a stator core is used, the scrap member is easily bent before the scrap member cut out from the plate by the press device is discharged to the outside of the laminate manufacturing apparatus. There is a problem that it is difficult to discharge from the body manufacturing apparatus.

  An object of this invention is to provide the laminated body manufacturing method and laminated body manufacturing apparatus which can discharge | emit efficiently the scrap member cut | disconnected from the thin plate member segment cut | disconnected from the thin plate.

(1) A thin plate (for example, a plate member 32 to be described later) by a press apparatus (for example, a press device 110 to be described later) provided with an upper mold (for example, an upper mold 110a to be described later) and a lower mold (for example, a lower mold 110b to be described later). ) Is a laminated body manufacturing method for manufacturing a laminated body (for example, a stator core 10 to be described later) by stacking thin plate member segments (for example, a divided core plate 12 to be described later). A cutting step of cutting out the thin plate member segments and chip-like scrap members (for example, scrap members S1 and S2 described later) from the thin plate by the lower die while being placed on the lower die, and the scrap member is the lower die the in mounted state, by rotating the lower mold, the centrifugal force acting on the scrap member, before the scrap member Laminate manufacturing method including a discharge step of discharging the lower die outside.

According to the invention described in (1), with the chip-like scrap member cut out from the thin plate by the cutting step being placed on the lower die, the lower die is rotated and the centrifugal force acting on the scrap member is applied. The scrap member is discharged to the outside of the lower mold.

  For this reason, every time the cutting process is performed, the chip-shaped scrap member is cut out from the thin plate, and the scrap member is discharged from the lower mold to the outside. Therefore, the scrap member may be bent and the scrap member may not be discharged from the lower mold. There is almost no.

  Further, since the chip-like scrap member is discharged to the outside by the rotation of the lower die, the scrap member cut from the thin plate and separated from the thin plate member segment can be efficiently discharged to the outside of the lower die.

  (2) The discharging step includes a step of rotating the lower die in a state where a scrap member holding device (for example, a lower pilot pin 130 to be described later) provided in the lower die holds the scrap member, and the scrap member The scrap member holding device releases the holding of the scrap member at a timing of discharging when the lower mold is rotating in a state of holding the scrap.

  According to the invention described in (2), the scrap member is held by the lower die by the scrap member holding device, and the scrap member holding device releases the holding of the scrap member at a timing when the lower die rotates and is about to be discharged. Thus, the scrap member can be discharged to the outside of the lower mold more reliably. For example, the timing of discharging may be set by the rotation angle of the lower mold.

(3) A laminated body for producing a laminated body (for example, a stator core 10 described later) by stacking thin plate member segments (for example, a divided core plate 12 described later) cut from a thin plate (for example, a plate member 32 described later). It is a manufacturing apparatus (for example, a laminate manufacturing apparatus 100 described later), and the thin plate member segments and chip-shaped scrap members (for example, scrap members S1 and S2 described later) from the thin plate in a state where the thin plate is placed. A press device (for example, press device 110 described later) including an upper die (for example, upper die 110a described later) and a lower die (for example, lower die 110b described later), and the scrap member is the lower die. the in mounted state, by rotating the lower mold, the centrifugal force acting on the scrap member, the scrap portion Rotation device for discharging to the outside of the lower die (e.g., the rotating device 200 to be described later) the laminate production apparatus comprising a, a.

According to the invention described in (3), in a state where the chip-like scrap member cut out from the thin plate by the upper die and the lower die is placed on the lower die, the lower die is rotated by the rotating device, and the scrap member The scrap member is discharged to the outside of the lower mold by the centrifugal force acting on the.

  For this reason, every time press cutting with the upper die and the lower die is performed, the chip-like scrap member is cut out from the thin plate, and the scrap member is discharged to the outside from the lower die. There is almost no fear that it will not be discharged from the lower mold.

  Further, since the chip-like scrap member is discharged to the outside of the lower die by the rotation of the lower die, the scrap member cut from the thin plate and separated from the thin plate member segment can be efficiently discharged.

  (4) The lower mold includes a scrap member holding device (for example, a lower pilot pin 130 to be described later) driven by a synchronization device (for example, a cam mechanism 140 to be described later), and the scrap member holding device is the lower mold. The scrap member is held when rotating, and when the lower mold is rotating while holding the scrap member, the holding of the scrap member is released at the timing of discharging.

  According to the invention described in (4), the scrap member is temporarily held by the scrap member holding device, and the scrap member holding device releases the holding of the scrap member at a timing when the scrap member is about to be discharged, so that the scrap is more reliably scraped. The member can be discharged to the outside. For example, the timing of discharging may be set by the rotation angle of the lower mold.

  ADVANTAGE OF THE INVENTION According to this invention, the laminated body manufacturing method and laminated body manufacturing apparatus which can discharge | emit efficiently the scrap member cut | disconnected from the thin plate member segment | segmented from the thin plate can be provided.

It is a perspective view of the laminated body manufactured by the laminated body manufacturing apparatus and laminated body manufacturing method which manufacture the laminated body which concerns on embodiment of this invention. It is the disassembled perspective view which decomposed | disassembled a part of laminated body shown in FIG. It is a schematic plan view which shows the structure of the manufacturing line of the laminated body shown in FIG. It is aa schematic sectional drawing of FIG. 3 in the laminated body manufacturing apparatus explaining the process of the manufacturing method of the laminated body shown in FIG. It is a schematic plan view of the laminated body manufacturing apparatus of the laminated body manufacturing line shown in FIG. FIG. 5 is a schematic cross-sectional view taken along the line aa of FIG. 3 in the laminate manufacturing apparatus for explaining the steps of the laminate manufacturing method following FIG. FIG. 7 is a schematic cross-sectional view taken along the line aa of FIG. 3 in the laminate manufacturing apparatus for explaining the steps of the laminate manufacturing method subsequent to FIG. 6. FIG. 8 is a schematic cross-sectional view taken along the line aa of FIG. 3 in the laminate manufacturing apparatus for explaining the steps of the laminate manufacturing method subsequent to FIG. 7. FIG. 9 is a schematic cross-sectional view taken along the line aa of FIG. 3 in the laminate manufacturing apparatus for explaining the steps of the laminate manufacturing method subsequent to FIG. 8. FIG. 10 is a schematic cross-sectional view taken along the line bb of FIG. 3 in the laminate manufacturing apparatus for explaining the steps of the laminate manufacturing method subsequent to FIG. 9. It is cc schematic sectional drawing of FIG. 3 in the laminated body manufacturing apparatus explaining the process of the manufacturing method of the laminated body following FIG. It is a schematic perspective view of the laminated body manufacturing apparatus explaining the process of the manufacturing method of the laminated body shown in FIG.

  Hereinafter, preferred embodiments of a laminate manufacturing apparatus 100 and a manufacturing method using the laminate manufacturing apparatus 100 according to the present invention will be described with reference to FIGS. 1 to 12.

  FIG. 1 is a perspective view of a multilayer body (stator core 10) manufactured by the multilayer body manufacturing apparatus 100 according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view in which a part of the laminate shown in FIG. 1 is disassembled. Stator core 10 constitutes an electric motor (motor) with a rotor (rotor) which is not illustrated, for example.

  The stator core 10 includes a first core plate 14 formed in a ring shape by arranging a plurality of (three in the present embodiment) divided core plates (stator core pieces) 12 made of a thin-plate fan-shaped electromagnetic steel plate in the circumferential direction, and a thin-plate fan shape. A plurality of divided core plates (stator core pieces) 12 made of electromagnetic steel plates are shifted from the first core plate 14 by a predetermined phase (60 degrees in the present embodiment) in the circumferential direction (three in the present embodiment). And a second core plate 18 formed in a ring shape. In the stator core 10, the second core plate 18 is laminated on the first core plate 14 that forms the lowermost layer. The first core plate 14 and the second core plate 18 are alternately stacked on the second core plate 18.

  In such a stator core 10, between the overlapping layers, that is, between the odd layers (the first layer, the third layer, etc.) and the even layers (the second layer, the fourth layer, etc.), the divided core plates constituting each layer are The layers of the end portions (abutting surfaces) in contact with each other are stacked in a state where the phases are shifted by a predetermined angle. Specifically, as shown in FIG. 2, for example, in the first core plate 14 constituting the first layer (lowermost layer) which is an odd layer, the position A1 of the end where the divided core plates 12 abut each other is They are arranged at a total of three locations in increments of a predetermined angle θ1 (120 degrees in this embodiment). On the other hand, in the second core plate 18 constituting the second layer which is an even layer, the position A2 of the end where the divided core plates 12 abut each other is shifted from the position A1 by a predetermined angle θ2 (60 degrees in the present embodiment). The position is set at a total of three locations in increments of a predetermined angle θ3 (120 degrees in this embodiment). The first core plate 14 and the second core plate 18 have the same shape except that they have a phase difference of a predetermined angle θ2.

  As shown in FIG. 2, the split core plate 12 is formed with a pair of substantially semicircular convex portions (protruding portions, plate-side convex portions) 24, 24 on the arc-shaped edge on the outer peripheral side. Six convex portions 24 are arranged at equal intervals (at intervals of 60 degrees) on the first core plate 14 on which three divided core plates 12 are arranged. A hole 20 into which the pin 22 (see FIG. 1) is inserted is formed in a substantially central portion of the convex portion 24. Similarly, in the second core plate 18, six convex portions 24 are arranged at equal intervals (at intervals of 60 degrees). A hole 20 into which the pin 22 (see FIG. 1) is inserted is formed in a substantially central portion of the convex portion 24.

  Here, the phase difference between the first core plate 14 and the second core plate 18 is 60 degrees, and the interval between the holes 20 is also 60 degrees. Therefore, the positions of the hole portions 20 of the first core plate 14 and the second core plate 18 coincide.

  Further, the split core plate 12 is formed with a plurality of slits 28 that are opened at substantially equal intervals along the arcuate edge on the inner peripheral side and open to the arcuate edge on the inner peripheral side. Therefore, similarly, the first core plate 14 and the second core plate 18 also have a plurality of openings that are open at substantially equal intervals along the arcuate edge on the inner circumference side and on the arcuate edge part on the inner circumference side. A slit 28 is formed.

  In the stator core 10, pins (coupling members) 22 are provided in the laminating direction (axis) in six hole portions (coupling portions, through holes) 20 provided in each layer of the laminated first core plate 14 and second core plate 18. Direction) and the layers are joined together. The number of stacked first and second core plates 14 and 18 forming the stator core 10 can be appropriately changed according to the use conditions and the like. Further, the respective layers of the stator core 10 are more firmly bonded by the adhesive 23 applied to the upper and lower surfaces of the divided core plate 12. Such an adhesive 23 is configured in a substantially thin film shape in a state where it is applied to the surface of the plate member 32 (see FIG. 3), the split core plate 12, and the like, and the adhesive force is not generated. It is preferable that an adhesive force is generated when the heat treatment and the cooling treatment are performed.

Next, an example of a manufacturing method for manufacturing the stator core 10 configured as described above will be described with reference to the drawings.
First, the stator core production line 30 will be described.

  As shown in FIG. 3, the stator core manufacturing line 30 that manufactures the stator core 10 includes a forming device 31 and a laminate manufacturing device 100. In the stator core production line 30, the plate member 32 made of a thin strip-shaped electromagnetic steel plate placed on the forming apparatus 31 is conveyed by one pitch in the arrow X direction (the arrow 1P in FIG. 3 corresponds to one pitch). Then, predetermined processing is performed by the forming device 31, and the divided core plate 12 is formed by the laminated body manufacturing device 100 and formed on the stator core 10.

  The molding apparatus 31 includes a pilot hole molding die 34, a caulking cut molding die 36, and a caulking bend slot molding die 38 from the upstream side to which the plate member 32 is conveyed toward the downstream side (arrow X direction). , And a window punching hole forming mold 40. Each of these molds includes, for example, an upper mold (not shown) provided with punches for punching holes and divided core plates, and a lower mold that is disposed opposite to the upper mold and on which the plate member 32 is conveyed. (Not shown). These operations will be described later.

FIG. 4 is a schematic cross-sectional view along the line aa in FIG. As shown in FIG. 3, the laminate manufacturing apparatus 100 is arranged in the direction of arrow X (downstream in the conveying direction of the plate member 32) in the molding apparatus 31. The laminate manufacturing apparatus 100 includes a press device 110 including an upper mold 110a and a lower mold 110b, and a rotating device 200 (see FIG. 5) that rotates the lower mold 110b of the press apparatus 110.
The lower mold 110b includes a substantially cylindrical outer guide 122 having a rotation center C as a central axis, and a cylindrical inner guide 121 having a rotation center C disposed inside the outer guide 122 as a central axis. A substantially ring-shaped space 123 is formed between the outer guide 122 and the inner guide 121.

  The laminate manufacturing apparatus 100 forms the split core plate 12 by press-cutting the plate member 32 that has been subjected to the predetermined processing by the forming apparatus 31 with the upper mold 110a and the lower mold 110b, and the first core plate 14 and the second core plate 12 are formed. The core plate 18 is configured to be sequentially stacked in a substantially ring-shaped space 123.

Hereinafter, the configuration of the laminate manufacturing apparatus 100 will be described.
First, the configuration of the upper mold 110a will be described.
As shown in FIG. 4, the upper mold 110a is configured to be able to reciprocate from a standby position (top dead center position) to a bottom dead center position by a press mechanism (not shown). This press mechanism may be a displacement mechanism having a crank mechanism, for example, or the entire press mechanism may be fixed to the frame M of the stator core manufacturing line 30.
The standby position is the position of the upper mold 110a when the cam of the crank mechanism is disposed at the top dead center position, and is the position where the upper mold 110a has moved to the top (see FIG. 4). The bottom dead center position is the position of the upper mold 110a when the cam of the crank mechanism is disposed at the bottom dead center position, and is the position where the upper mold 110a has moved to the lowest position (see FIG. 8).

The upper die 110a includes an “upper pressing member 115”, an “upper pilot pin 111”, a “first punch 112”, and a “compression coil 113” that urges the first punch 112 toward the lower die 11b, Two sets of “second punch 114” are provided.
The “first punch 112” and the “second punch 114” urged in the direction of the lower mold 110b by the “compression coil 113” are attached to a frame Ma that moves up and down by a press mechanism.
Further, the “upper pressing member 115” and the “upper pilot pin 111” are opposed to the frame Ma via an elastic member (not shown) in the direction opposite to the arrow X of the frame Ma (upstream in the conveying direction of the plate member 32). Are attached to a frame Mb that is relatively movable up and down.

The two upper pressing members 115 are formed so as to be able to press the periphery of each of the two pilot holes 47 formed at every pitch at both ends of the plate member 32.
Each of the two upper pilot pins 111 is formed so as to penetrate the center of the upper pressing member 115, and has an outer diameter that can be inserted into the pilot hole 47. The upper pilot pin 111 positions the cutting member 32a (see FIG. 7) cut out from the plate member 32 from the remaining plate member 32 side.

  As shown in FIG. 4, the two first punches 112 are formed by cutting a cutting member 32 a cut out from the plate member 32 (a member in a state where the divided core plate 12 and the scrap members S <b> 1 and S <b> 2 are connected) to the plate member 32. (See FIG. 7). On the lower surfaces of the two first punches 112 (surfaces facing the lower mold 110b), there are pressing surfaces 112a for holding the portions to be scrap members S1 and S2 of the cutting member 32a cut out from the plate member 32. Is formed. A cutting blade for cutting the cutting member 32a from the plate member 32 is formed at the edge portion 112b of each pressing surface 112a in the direction opposite to the arrow X (upstream in the conveying direction of the plate member 32). An insertion hole 112c having an opening on the lower side is formed in the approximate center of each of the two first punches 112. Each insertion hole 112c has a distal end portion of the lower pilot pin 130 so that the distal end portions of the two lower pilot pins 130 having outer diameters that can be inserted into the pilot holes 47 formed in the plate member 32 can be respectively inserted. It is a hole having substantially the same size as the outer diameter.

  Here, the distance between the central axis of the upper pilot pin 111 and the central axis of the lower pilot pin 130 corresponds to one pitch in the conveyance of the plate member 32.

  The two compression coils 113 arranged between the frame Ma and the first punch 112 are set to a predetermined elastic value. The predetermined elastic value is cut out from the plate member 32 at the bottom dead center position while ensuring “rigidity” that only applies a downward urging force capable of cutting the plate member 32 to the first punch 112 (see FIG. 7). After the cut member 32a hits the lower jig 125, when the frame Ma further moves in the direction of the lower mold 110b, the first punch 112 hits the cut member 32a against the lower jig 125 against the movement of the frame Ma. The elastic value is such that it can be stopped when applied (see FIG. 8).

  As shown in FIG. 4, the edges in the direction opposite to the arrow X (upstream in the conveying direction of the plate member 32) of the lower surfaces (surfaces facing the lower mold 110 b) of the two second punches attached to the frame Ma In the portion 114a, a cutting member 32a cut out by the first punch 112 (a member in which the divided core plate 12 and the scrap members S1 and S2 are connected) is divided into the divided core plate 12 and the scrap members S1 and S2. A cutting blade for press cutting is formed (see FIG. 8).

Next, the configuration of the lower mold 110b will be described.
The lower mold | type 110b is provided with the substantially cylindrical outer guide 122 and the cylindrical inner guide 121 arrange | positioned inside the outer guide 122 as above-mentioned. A substantially ring-shaped space 123 is formed between the outer guide 122 and the inner guide 121 in the lower mold 110. The lower mold 110 b is placed on a rotary table 204 that is rotated by the rotating device 200.

FIG. 5 is a plan view of the laminate manufacturing apparatus 100.
The three divided core plates 12 constituting the first core plate 14 are respectively accommodated in a range α1, a range α2, and a range α3 obtained by dividing the space 123 formed in the lower mold 110b into three equal parts. Further, the three divided core plates 12 constituting the second core plate 18 are accommodated in a range β1, a range β2, and a range β3 obtained by dividing the space 123 into three equal parts, respectively.

  The outer guide 122 includes a region of the outer guide 122 corresponding to each of the range α1, the range α2, and the range α3, and a region of the outer guide 122 corresponding to each of the range β1, the range β2, and the range β3 (total of six regions). The “lower holding member 124”, the “lower jig 125”, the “pusher 126” accommodated in the lower jig 125 so as to be movable in the vertical direction, and the pusher 126 on the upper side (in the direction of the upper mold 110a). The “compression coil 128” for urging the cutting member 32a, the “lower pilot pin 130” for positioning the cutting member 32a and holding the cutting member 32a, and the scrap members S1, S2 obtained by cutting the lower pilot pin 130 from the cutting member 32a The “cam mechanism 140” for releasing the holding is provided as one set, and two sets thereof are provided. Accordingly, the outer guide 122 includes 12 sets of these.

  Here, FIG. 5 shows only the pusher 126 and the lower pilot pin 130, but the pusher 126 and the lower pilot pin 130 related to the range α1, the range α2, and the range α3 have “◎” after the reference numerals. It is attached. Further, the pusher 126 and the lower pilot pin 130 related to the range β1, the range β2, and the range β3 are marked with “*” after the reference numerals.

  The upper mold 110a is rotated by the lower mold 110b in synchronization with the vertical reciprocation of the upper mold 110a, so that the range α1, the range α2, the range α3, the range β1, the range β2, and the range β3 ( It corresponds to the order in total (6 ranges).

  Hereinafter, a “lower holding member 124” provided on the outer guide 122 of the lower mold 110b, a “lower jig 125”, and a “pusher 126” accommodated in the lower jig 125 so as to be movable in the vertical direction, “Compression coil 128” for urging the pusher 126 upward (in the direction of the upper die 110a), “lower pilot pin 130” for positioning the cutting member 32a and holding the cutting member 32a, and the lower pilot pin 130 cutting The “cam mechanism 140” for releasing the holding of the scrap members S1 and S2 cut out from the member 32a will be described.

  As shown in FIG. 4, the lower pressing member 124 is provided on the outer guide 122 so as to face the upper pressing member 115 of the upper mold 110a. An insertion hole 124 b into which the tip of the upper pilot pin 111 can be inserted is formed in the upper surface 124 a of the lower pressing member 124. A recess 124 c into which the pin 141 of the cam mechanism 140 is inserted is formed on the side surface of the lower pressing member 124 (the outer surface of the outer guide 122).

  The lower jig 125 is provided to face the first punch 112 of the upper mold 110a. On the upper surface of the lower jig 125, a concave step portion 125b having a predetermined depth is formed. A cutting blade is formed at the end 125e of the step 125b of the lower jig 125 in the direction opposite to the arrow X (upstream in the conveying direction of the plate member 32). The lower jig 125 is configured such that the end portion 125e and the edge portion 112b of the first punch 112 cooperate to cut the plate member 32 and cut the cutting member 32a. A cutting blade is formed on the end 125 g of the lower jig 125 on the opposite side of the stepped portion 125 b, that is, on the end 125 g in the direction of arrow X (downstream in the conveying direction of the plate member 32). The lower jig 125 is configured so that the end 125g and the edge 114a of the second punch 114 cooperate to cut the cutting member 32a to separate the split core plate 12 and the scrap members S1 and S2. ing.

  The pusher 126 has a cylindrical portion 126a and a flange portion 126b formed at one end of the cylindrical portion 126a. The pusher 126 has a through hole 126c that penetrates the pusher 126 in the axial direction of the cylindrical portion 126a.

The lower jig 125 includes an insertion hole 125a extending in the vertical direction through which the cylindrical portion 126a of the pusher 126 can be inserted. The lower jig 125 accommodates the flange 126b of the pusher 126 below the insertion hole 125a. A portion 125c is provided. The pusher 126 is disposed on the lower jig 125 so that the cylindrical portion 126a is inserted into the insertion hole 125a and the flange portion 126b is in contact with the inner wall of the accommodating portion 125c.
In addition, a lower pilot pin 130 extending from the lower side through the through hole 126c of the pusher 126 and extending upward is disposed at the center of the insertion hole 125a of the lower jig 125. The tip of the lower pilot pin 130 protrudes upward from the tip of the cylindrical portion 126 a of the pusher 126 and can be inserted into the insertion hole 112 c of the first punch 112.

A compression coil 128 that urges the pusher 126 upward (upper mold 110a) is provided below the flange 126b of the pusher 126. In the pusher 126, the tip of the cylindrical portion 126 a protrudes above the stepped portion 125 b on the upper surface of the lower jig 125 by the urging force above the compression coil 128 (on the upper mold 110 a side). The protruding amount of the upper surface of the lower jig 125 at the end of the cylindrical portion 126a from the step portion 125b is preferably the above-mentioned “predetermined depth of the step portion 125b”. When the pressing force of the first punch 112 through the cutting member 32a exceeds the urging force of the compression coil 128, the tip of the cylindrical portion 126a moves backward to the step portion 125b.
The urging force of the compression coil 128 is set to be smaller than the urging force of the compression coil 113 of the first punch 112.

  The cam mechanism 140 includes a pin 141, a compression coil spring 142 that urges the pin 141 in a direction away from the pusher 126, and a sliding member 144 that is disposed at the base end of the pin 141 via an elastic body 143. The elastic body 143 urges the pin 141 with a predetermined force in a direction approaching the pusher 126 when the sliding member 144 is pushed in a direction approaching the pusher 126.

  As shown in FIG. 4, the pin 141 is inserted through the lower pressing member 124 so as to be movable in the horizontal direction. The pin 141 has a rod-shaped pin main body 141a with a sharp tip, and a flange 141b formed at the center of the pin main body 141a and sliding on the inner peripheral surface of the recess 124c. The pin main body 141 a is disposed so as to penetrate the bottom surface of the recess 124 c formed in the horizontal direction of the lower pressing member 124 toward the pusher 126.

  When the tip of the cylindrical portion 126a of the pusher 126 protrudes from the step portion 125b on the upper surface of the lower jig 125, the tip of the pin 141 abuts on the flange 126b of the pusher 126, and the tip of the cylindrical portion 126a of the pusher 126 Is retracted to the stepped portion 125b on the upper surface of the lower jig 125, the pin 141 is configured such that the tip of the pin 141 is positioned above the flange 126b of the pusher 126 (on the upper mold 110a side). Yes.

  The compression coil spring 142 is disposed in a compressed state between the flange 141b of the pin 141 and the bottom surface of the recess 124c. Therefore, the compression coil spring 142 urges the pin 141 in the direction away from the pusher 126. When the tip of the cylindrical portion 126 a of the pusher 126 is retracted to the stepped portion 125 b on the upper surface of the lower jig 125, the pin 141 can be advanced toward the pusher 126 against the compression coil spring 142. When the tip of the pin 141 is positioned on the upper side (upper mold 110a side) of the flange 126b (see FIG. 7), the pin 141 can be regulated so that the pusher 126 does not move upward (in the direction of the upper mold 110a). .

  A sliding member 144 is disposed at the base end of the pin 141 via an elastic body 143. The urging force of the elastic body 143 is larger than the urging force of the compression coil spring 142. When the tip end of the cylindrical portion 126a of the pusher 126 protrudes from the step portion 125b on the upper surface of the lower jig 125, the tip end of the pin 141 is positioned at the flange portion 126b of the pusher 126 (see FIGS. 4 and 6).

  The sliding member 144 has, on the opposite side of the pusher 126, a sliding surface 144a that engages with the sliding surface Msa and the sliding surface Msb (see FIG. 3) of the frame M. The sliding surface 144a is applied to the elastic body 143 even when the sliding member 144 moves in the circumferential direction of the sliding surface Msa and the sliding surface Msb as the lower mold 110b (the rotary table 204) rotates. The biasing force of the coil spring 142 is configured not to leave the sliding surface Msa and the sliding surface Msb.

  As shown in FIG. 3, since the angle of both ends of one divided core plate 12 is 120 degrees, one divided core plate 12 is formed while the lower mold 110b (rotary table 204) rotates 120 degrees. The As described above, the outer guide 122 of the lower mold 110b includes the “lower holding member 124”, the “lower jig 125”, the “pusher 126”, the “compression coil 128”, the “lower pilot pin 130”, The “cam mechanism 140” is provided as a set. While one set of elements performs one cycle of operation, the sliding member 144 of the cam mechanism 140 moves 120 degrees from the position A to the position B. In the sliding surface from the position A to the position B, the sliding surface Msa is about the first 3/4 of 120 degrees, and then the sliding surface Msb is continuous thereto.

  The distance Rb between the sliding surface Msb and the rotation center C is larger than the distance Ra between the sliding surface Msa and the rotation center C by a distance δ (see FIG. 3). That is, when the sliding member 144 moves toward the position B, the sliding member 144 moves away from the pusher 126 by a distance δ at a predetermined timing when the sliding surface Msa switches to the sliding surface Msb. The pin 141 moves in a direction away from the pusher 126.

  At the timing when the sliding surface with the sliding member 144 is switched from the sliding surface Msa to the sliding surface Msb, the tip of the cylindrical portion 126a of the pusher 126 is retracted to the step portion 125b on the upper surface of the lower jig 125. The tip of the pin 141 is located above the flange 126b of the pusher 126 (upper mold 110a). Therefore, when the pin 141 moves away from the pusher 126, there is no restriction on the upward movement (the direction of the upper mold 110a) with respect to the flange 126b at the tip of the pin 141. Therefore, the pusher 126 moves upward by the urging force of the compression coil 128, and the tip of the cylindrical portion 126 a of the pusher 126 protrudes from the stepped portion 125 b on the upper surface of the lower jig 125. At this time, the pusher 126 pushes up the scrap members S <b> 1 and S <b> 2 inserted into the lower pilot pin 130 so as to be detached from the lower pilot pin 130.

Next, a method for manufacturing the stator core 10 using the stator core manufacturing line 30 will be described with reference to FIGS.
First, the manufacturing method of the stator core 10 by the shaping | molding apparatus 31 is demonstrated. In this manufacturing method, each step is performed every time the plate member 32 is conveyed by one pitch.

  As shown in FIG. 3, first, pilot holes 47 and 47 are opened by the pilot hole molding die 34 of the molding apparatus 31 for the plate member 32 conveyed by a conveying means (not shown). These pilot holes 47 are engaged with pilot pins (not shown) provided on each mold and the stator core manufacturing line 30 for each process, and the plate member 32 is positioned at a predetermined position in each subsequent process. Fulfills the function.

  After the pilot hole 47 is opened in the plate member 32, the plate member 32 is conveyed by 1 pitch (in the direction of arrow X), and the pilot hole 47 is engaged with the pilot pin to position the plate member 32. Since the positioning operation using the pilot hole 47 and the pilot pin is performed in the same manner in each step, the description thereof is omitted below.

  A caulking convex portion 48 is formed on the plate member 32 by the caulking cut molding die 36 of the molding apparatus 31. The back side of the convex portion 48 is recessed.

  Thereafter, the plate member 32 is conveyed by 3 pitches by the conveying means (in the direction of the arrow X), and a plurality of long holes 49 are opened in the plate member 32 by the caulking bend slot molding die 38.

  Thereafter, the plate member 32 is conveyed by 2 pitches by the conveying means (in the direction of the arrow X), and the crescent-shaped window opening hole 50 is opened in the plate member 32 by the window opening hole forming mold 40.

  Next, the manufacturing method of the stator core 10 by the laminated body manufacturing apparatus 100 is demonstrated. Also in this manufacturing method, each process is implemented every time the plate member 32 is conveyed by 1 pitch.

The laminate manufacturing apparatus 100 forms one split core plate 12 from the plate member 32 while the plate member 32 is conveyed by 1 pitch, and the lower mold 110b of the press device 110 is rotated 120 degrees around the rotation center C. The first core plate 14 and the second core plate 18 are alternately formed by arranging them at predetermined positions in the lower mold 110b space 123.
Since the phase angle between the first core plate 14 and the second core plate 18 is 60 degrees, the rotating device 200 includes the three divided core plates 12 accommodated in the space 123 and the first core plate 14 After the formation, when the second core plate 18 is formed on the first core plate 14, the lower mold 110b is rotated 180 degrees. Similarly, when the first core plate 14 is formed on the second core plate 18 after the second core plate 18 is formed, the lower mold 110b is rotated 180 degrees.

  As shown in FIG. 4, when the plate member 32 is conveyed in the direction of the one-pitch arrow X, the pilot holes 47 and 47 that are most downstream in the conveyance direction of the plate member 32 are arranged at the position of the lower pilot pin 130, Further, the pilot holes 47, 47 that are one upstream in the transport direction are arranged at the position of the upper pilot pin 111.

  Next, when the upper mold 110a moves downward, as shown in FIG. 6, the upper pilot pin 111 passes through the pilot hole 47 and is inserted into the insertion hole 124b of the lower pressing member 124, and the plate member 32 is pressed. Positioning is performed with respect to the device 110 (lower mold 110b). Next, the plate member 32 is held between the upper pressing member 115 and the lower pressing member 124 at the positioned position.

  The pressing surface 112a of the first punch 112 is in contact with the upper surface of the plate member 32, and the pressing member 112a of the first punch 112, the upper surface of the lower jig 125, and the lower jig 125 It is sandwiched between the tip of the cylindrical portion 126a of the pusher 126 protruding from the stepped portion 125b on the upper surface.

  As shown in FIG. 7, the compression coil 113 further has “rigidity” sufficient to apply a downward urging force capable of cutting the plate member 32 to the first punch 112. Therefore, when the upper die 110 a moves downward (in the direction of the lower die 110 b), the first punch 112 causes the plate member 32 to end with the cutting blade formed on the edge portion 112 b of the first punch 112 and the lower jig 125. The cutting member 32a in a state where the divided core plate 12 and the scrap members S1 and S2 are connected is cut out from the plate member 32 with a cutting blade formed in the portion 125e.

  At this time, the front end of the cylindrical portion 126a of the pusher 126 moves back to the stepped portion 125b on the upper surface of the lower jig 125 by the pressing force of the first punch 112 through the cut cutting member 32a. Further, the aforementioned “most downstream pilot holes 47 and 47 in the transport direction” become the pilot holes 47 and 47 of the cut member 32a. The lower pilot pin 130 is inserted into the pilot holes 47, 47 of the cutting member 32 a, whereby the cut cutting member 32 a is positioned by the lower pilot pin 130.

  Even after the cutting member 32a is cut out, the first punch 112 has the pressing surface 112a of the first punch 112, the step portion 125b on the upper surface of the lower jig 125, and the upper surface of the lower jig 125 by the urging force of the compression coil 113. The cutting member 32a is strongly sandwiched between the front end of the cylindrical portion 126a of the pusher 126 that has been retracted to the step portion 125b.

When the front end of the cylindrical portion 126a of the pusher 126 moves back to the stepped portion 125b on the upper surface of the lower jig 125 by the pressing force of the first punch 112 through the cut cutting member 32a, the flange portion 126b of the pusher 126 moves downward. Moving.
At the timing of cutting out the cutting member 32a, the sliding member 144 connected to the pin 141 is configured to slide with the small-diameter sliding surface Msa. Therefore, the pin 141 moves in a direction approaching the pusher 126 by the expansion force of the elastic body 143 (the elastic body 143 expands from the dimension R1 (see FIG. 6) to the dimension R2 (see FIG. 7)). Therefore, the tip of the pin 141 is disposed on the upper side of the flange portion 126 b, the pusher 126 is restricted from moving upward (in the direction of the upper mold 110 a), and the tip of the cylindrical portion 126 a of the pusher 126 is the upper surface of the lower jig 125. The stepped portion 125b is held back.

As shown in FIG. 8, when the upper die 110a is further moved downward toward the bottom dead center position, the second punch 114 has a cutting blade formed on the lower edge portion 114a and the other of the step portion 125b. The cutting member 32a is press-cut by the cutting blade formed at the end portion 125g of the steel sheet, and the divided core plate 12 and the scrap members S1 and S2 are cut out.
The cut divided core plate 12 is pushed into the space 123 between the inner guide 121 and the outer guide 122 by the second punch 114 to form the first core plate 14 and the second core plate 18. At this time, the convex portions 48 for caulking provided on the divided core plate 12 (plate member 32) are matched in the stacking direction when the divided core plates 12 are overlapped, and the convex portions 48 are fitted, The split core plates 12 can be joined.

As shown in FIG. 9, when the upper mold 110a moves upwards past the bottom dead center position, the first punch 112 releases the gripping of the scrap members S1 and S2. At this time, since the lower pilot pin 130 is inserted into the pilot hole 47 of the scrap member S1, the scrap member S1 maintains the state of being disposed at the step portion 125b.
Further, when the upper mold 110a moves upward, the upper pressing member 115 releases the grip of the plate member 32, and the upper pilot pin 111 is removed from the pilot holes 47 and 47 of the cutting member 32a. The pilot holes 47 and 47 of the cutting member 32a become “the most downstream pilot holes 47 and 47 in the transport direction” in the next cycle.

  When the upper pilot pin 111 is removed from the pilot holes 47, 47 of the cutting member 32a, the engagement between the upper mold 110a and the lower mold 110b is released, and the lower mold 110b becomes rotatable.

FIG. 10 is a schematic cross-sectional view taken along line bb of FIG. In this state, after the lower mold 110b becomes rotatable, the position of the step portion 125b on which the scrap member S1 of the lower mold 110b is placed is changed from the position A (a-a line) to the position B (c- It is in a state where it has been rotated to the position of the bb line in the middle of rotating toward the c line).
At this time, a centrifugal force as an outward force acts on the scrap member S1 due to the rotation of the lower mold 110b. However, since the lower pilot pin 130 is inserted through the pilot hole 47 in the scrap member S1, the scrap member S1 still does not come off the lower pilot pin 130.

  11 is a schematic cross-sectional view taken along the line cc of FIG. In this state, the surface sliding with the sliding member 144 is switched from the sliding surface Msa to the sliding surface Msb by the rotation of the lower mold 110b. The distance between the sliding member 144 and the rotation center C is changed from the distance Ra between the sliding surface Msa of the frame M and the rotation center C to the distance Rb between the sliding surface Msb of the frame M and the rotation center C. spread. Here, the position of transition from the sliding surface Msa to the sliding surface Msb is the timing for discharging the scrap member S1. At this timing, the pin 141 moves away from the pusher 126.

At this time, the distal end of the cylindrical portion 126a of the pusher 126 is retracted to the step portion 125b on the upper surface of the lower jig 125, and the distal end of the pin 141 is positioned above the flange portion 126b of the pusher 126 (upper mold 110a). doing. Therefore, when the pin 141 moves away from the pusher 126, there is no restriction on the upward movement (the direction of the upper mold 110a) with respect to the flange 126b at the tip of the pin 141. For this reason, the pusher 126 moves upward by the urging force of the compression coil 128. The tip of the cylindrical portion 126 a of the pusher 126 protrudes from the step portion 125 b on the upper surface of the lower jig 125. At this time, the pusher 126 pushes up the scrap members S <b> 1 and S <b> 2 inserted into the lower pilot pin 130 so as to be detached from the lower pilot pin 130.
Accordingly, as shown in FIG. 12, the scrap member S1 is discharged to the outside of the press device 110 (lower mold 110b) by centrifugal force as outward force. The scrap member S2 is similarly discharged to the outside at a predetermined timing.

  As described above, according to the present embodiment, the chip-shaped scrap member cut out from the thin plate by the cutting process shown in FIGS. 4 and 6 to 8 is placed on the press device 110 in FIGS. 11, the lower mold 110 b is rotated, and the scrap members S <b> 1 and S <b> 2 are discharged out of the press device 110 by centrifugal force acting on the scrap members S <b> 1 and S <b> 2.

  For this reason, every time the cutting process is executed, the chip-shaped scrap member is cut out from the thin plate. Therefore, in the discharging process in which the scrap member is discharged from the lower mold of the press device to the outside of the lower mold, the scrap member is bent. There is almost no fear that it will end up.

  Further, since the chip-like scrap member is discharged to the outside of the lower die of the press device by the rotation by the rotating device, the scrap member cut from the thin plate and separated from the thin plate member segment can be efficiently discharged.

As mentioned above, although demonstrated using embodiment of this invention, the technical scope of this invention is not limited to the range as described in the said embodiment.
For example, in the above embodiment, centrifugal force is used as the outward force, but the present invention is not limited to this. The outward force may be, for example, an attractive force by air or a magnetic force by a magnet.
Moreover, in the said embodiment, although the coupling | bonding between each layer in a laminated body is a coupling | bonding by an adhesive agent, it is not restrict | limited to this. For example, the connection between the layers may be a connection by caulking. In this case, when a thin plate member segment is formed from a thin plate by a press device, a crimping dowel may be formed on the thin plate member segment, and when the thin plate member segment is pushed by the second punch, the crimping dowels may be joined together.
Various modifications or improvements can be added to the above embodiment. It is apparent from the description of the scope of claims that the embodiments added with such changes or improvements can also be included in the technical scope of the present invention.

C Rotation center Msa Sliding surface Msb Sliding surface S1 Scrap member S2 Scrap member 10 Stator core 12 Divided core plate 30 Stator core production line 31 Molding device 32 Plate member (thin plate)
100 Laminate Manufacturing Device 110 Press Device 110a Upper Die 110b Lower Die 111 Upper Pilot Pin 112 First Punch 113 Compression Coil 114 Second Punch 115 Upper Holding Member 124 Lower Holding Member 125 Lower Jig 126 Pusher 128 Compression Coil 130 Lower Pilot Pin 143 Elastic body 144 Sliding member 144a Sliding surface 200 Rotating device

Claims (4)

A laminate manufacturing method for manufacturing a laminate by laminating thin plate member segments cut from a thin plate by a press device having an upper die and a lower die,
A cutting step of cutting out the thin plate member segment and the chip-shaped scrap member from the thin plate by the lower die while the thin plate is placed on the lower die;
A discharging step of rotating the lower mold in a state where the scrap member is placed on the lower mold and discharging the scrap member to the outside of the lower mold by a centrifugal force acting on the scrap member; A laminate manufacturing method including the same.   The discharging step includes a step of rotating the lower die while the scrap member holding device provided on the lower die holds the scrap member, and the lower die rotating while holding the scrap member. 2. The method for manufacturing a laminate according to claim 1, further comprising: a step of releasing the holding of the scrap member by the scrap member holding device at a timing of discharging. A laminate manufacturing apparatus for manufacturing a laminate by laminating thin plate member segments cut from a thin plate,
A pressing device comprising an upper die and a lower die for cutting the thin plate member segment and the chip-like scrap member from the thin plate by pressing in a state where the thin plate is placed;
A rotating device that rotates the lower mold in a state where the scrap member is placed on the lower mold, and discharges the scrap member to the outside of the lower mold by a centrifugal force acting on the scrap member; Including laminate manufacturing apparatus. The lower mold includes a scrap member holding device driven by a synchronization device,
The scrap member holding device holds the scrap member when the lower mold is rotated, and when the lower mold is rotated while holding the scrap member, at a timing of discharging. The laminated body manufacturing apparatus of Claim 3 which cancel | releases holding | maintenance of the said scrap member.

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