JP2007211262A - Molding insertion device and positioning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding insertion device and a positioning method where a ring-shaped member can be positioned to a cavity without deviation. <P>SOLUTION: The molding insertion device 10 is equipped with: an upper punch 22 provided coaxially with a cavity 58; and a holding unit 74 for holding a back yoke 204. The holding unit 74 comprises: a moving member 84 movable to a horizontal direction; and a pair of clampers 114 provided at the moving member 84 and movable together with the moving member 84. A pair of clampers 114 hold the back yoke 204 coaxially with a through hole 94 in the moving member 84. The upper punch 22 progresses into the through hole 94, and the moving member 84 moves in such a manner that the through hole 94 is located coaxially with the cavity 58, thus the back yoke 204 held by the pair of clampers 114 is positioned coaxially with the cavity 58. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a molded fitting device and a positioning method, and more particularly, to a molded fitting device for fitting a molded body to a ring-shaped member and a ring-shaped member positioning method in the molded fitting device.

  In general, it is known to manufacture a yoke-integrated bonded magnet by bonding a ring-shaped bonded magnet, which is an example of a molded body, to an inner peripheral surface of a back yoke, which is an example of a ring-shaped member, using an adhesive. However, when a yoke-integrated bonded magnet is manufactured using an adhesive, it is necessary to perform the pressing operation and the bonding operation separately, so that there is a problem that productivity is low and manufacturing cost increases. Further, since it is difficult to uniformly apply an adhesive between the ring-shaped bond magnet and the back yoke, it is difficult to arrange the ring-shaped bond magnet and the back yoke coaxially. For this reason, if a yoke-integrated bonded magnet using an adhesive is used in a spindle motor of a hard disk drive, there is a risk that the performance of the hard disk drive may be degraded, such as data reading errors or noise during rotation. In addition, the component contained in the adhesive volatilizes, which may adversely affect the device using the yoke-integrated bonded magnet.

  For these reasons, various techniques for integrally providing a molded body and a ring-shaped member without using an adhesive have been proposed. As an example, for example, in Patent Document 1, a powder for a molded body and a powder for a ring-shaped member are sequentially loaded into a cavity and pressed, so that the molded body and the ring-shaped member are integrated in the cavity. The providing technique is disclosed. However, in the technique of Patent Document 1, the dimensions of the integrally formed molded body and the ring-shaped member change due to release of the stress generated when taking out from the cavity (spring back) and subsequent thermosetting treatment. There was a problem of doing. That is, there is a problem that the final dimensional accuracy of the product is poor. Moreover, since it is necessary to use a thermosetting resin etc. as a material of a ring-shaped member, the material of the ring-shaped member was limited and there existed a possibility that required intensity | strength could not be ensured.

  As another example, Patent Document 2 discloses a technique in which a ring-shaped member having an inner diameter smaller than the outer diameter of a molded body is heated and expanded at room temperature, and the molded body is fitted thereto. However, the technique of Patent Document 2 requires a work for heating the ring-shaped member, and has a problem that productivity is poor. Further, since the molded body is fitted to the heated ring-shaped member, the heat of the ring-shaped member is transmitted to the molded body, which may change the characteristics of the molded body.

Therefore, the applicant of the present application uses a spring back in Patent Document 3 in which a ring-shaped member is arranged on a mold so that a punch is inserted when powder in a cavity is pressed, and a molded body is taken out from the cavity. The technique which fits a molded object to a ring-shaped member is proposed. According to this technique, there is no problem as described above, and the molded body can be fitted to the ring-shaped member.
JP-A-7-169633 JP2002-223539 International Publication WO2006 / 001304

  When the molded body is fitted to the ring-shaped member by springback, the dimensional difference (clearance) between the outer diameter of the cavity and the inner diameter of the ring-shaped member is about several tens of μm in consideration of the expansion rate of the molded body by the springback. Is set. For this reason, it is required to position the ring-shaped member with high accuracy with respect to the cavity, and even if the ring-shaped member is slightly displaced from the cavity, the punch contacts the ring-shaped member during pressing and the ring-shaped member. There was a risk of galling.

  Therefore, a main object of the present invention is to provide a molded fitting device and a positioning method capable of positioning a ring-shaped member without displacement with respect to a cavity.

  In order to achieve the above-mentioned object, the molding / fitting device according to claim 1 is a molding / fitting device for molding a molded body and fitting the molded body to a ring-shaped member, wherein the gold is formed with a cavity. A punch for obtaining a molded body by pressing powder filled in the mold, coaxially with the cavity above the mold and the mold, and a holding means for holding the ring-shaped member, and the holding means is a punch And a moving member that moves so that the through hole is positioned coaxially with the cavity when the punch enters the through hole, and is provided on the mold so as to be movable together with the moving member. And a clamping mechanism for holding the ring-shaped member coaxially with the through hole.

  The molded fitting device according to claim 2 is the molded fitting device according to claim 1, wherein the clamp mechanism includes a pair of clampers that sandwich the outer peripheral surface of the ring-shaped member, and each of the pair of clampers is a ring. It has a pressure-contact part which press-contacts to the outer peripheral surface of a ring-shaped member, and a projection part which touches the upper end surface of a ring-shaped member so that it may not face the inside of a ring-shaped member.

  The molding / fitting device according to claim 3 is the supply unit according to claim 1 or 2, wherein the ring-shaped member is dropped so as to pass through the through hole and the ring-shaped member is supplied to the holding unit. And a moving means for moving the holding means to place the holding means at a press position where the punch can be inserted through the through-hole or a supply position where the ring-shaped member is supplied by the supply means. And a shutter mechanism for receiving the ring-shaped member from the supply means and dropping the ring-shaped member onto the mold at the press position.

  According to a fourth aspect of the present invention, there is provided the molded fitting device according to the third aspect, wherein the shutter mechanism holds the ring-shaped member below the lower end opening of the through hole. .

  The molding / fitting device according to claim 5 is the molding / fitting device according to claim 3, wherein the shutter mechanism holds the ring-shaped member coaxially with the through hole by sandwiching the outer peripheral surface of the ring-shaped member. And a pair of shutters.

  The molded fitting device according to claim 6 is the molded fitting device according to any one of claims 3 to 5, wherein the holding means further includes a rotary cam for operating the clamp mechanism and the shutter mechanism in synchronization. It is characterized by including.

  According to a seventh aspect of the present invention, there is provided the molding and fitting apparatus according to the sixth aspect, further comprising drive means for rotating the rotary cam using a force for lowering the punch.

  According to an eighth aspect of the present invention, in the molded fitting device according to the seventh aspect, the holding means includes a latch mechanism for restricting the rotation of the rotary cam while holding the ring-shaped member by the clamp mechanism. It is further characterized by including.

  The molding and fitting device according to claim 9 is the molding and fitting device according to any one of claims 3 to 8, wherein the supply means includes a magazine loaded with a ring-shaped member, and the magazine is a ring-shaped member. And a rod-shaped member having an outer diameter slightly smaller than the inner diameter of the ring-shaped member and inserted through the ring-shaped member.

  The molding and fitting device according to claim 10 is the molding and fitting device according to claim 9, wherein the magazine is arranged on the same axis as the rod-shaped member and covers the outer peripheral surface of the ring-shaped member through which the rod-shaped member is inserted. It further includes a shaped member.

  The positioning method according to claim 11, wherein a molded body is obtained by pressing the powder filled in the cavity with a punch provided coaxially with the cavity of the mold, and the molded body is fitted to the ring-shaped member. A method for positioning a ring-shaped member in a combination apparatus, wherein when a powder is pressed, a moving member is moved by causing a punch to enter a through-hole provided in the moving member, and a through-hole is provided by a clamp mechanism provided in the moving member. A ring-shaped member held coaxially with the cavity is positioned coaxially with the cavity.

  In the molding fitting apparatus according to the first aspect, when the powder is pressed, the moving member moves so that the through hole is positioned coaxially with the cavity when the punch enters the through hole of the moving member. Along with this, the ring-shaped member that is held coaxially with the through hole is positioned coaxially with the cavity by the clamp mechanism that moves together with the moving member. In this way, the ring-shaped member can be positioned without deviation with respect to the cavity, so that the ring-shaped member can be prevented from being galling. The same applies to the positioning method according to claim 11.

  In the molding fitting device according to the second aspect, the pair of clampers are in pressure contact with the outer peripheral surface of the ring-shaped member at the press-contact portion, and are in contact with the upper end surface of the ring-shaped member at the protrusion portion. Accordingly, when the molded body in the cavity is fitted to the ring-shaped member from below, the ring-shaped member can be prevented from shifting upward, and the molded body can be properly fitted to the ring-shaped member.

  In the molding fitting apparatus according to the third aspect, the shutter mechanism receives the ring-shaped member that is supplied by being dropped at the supply position by the supply means, and drops the ring-shaped member onto the mold at the press position. Accordingly, the ring-shaped member can be disposed on the mold without dragging on the mold, and the ring-shaped member can be prevented from being fitted into the cavity.

  In the molded fitting device according to the fourth aspect, the shutter mechanism holds the ring-shaped member below the lower end opening of the through hole. By holding the ring-shaped member at a position close to the mold in this way, the ring-shaped member can be dropped in an appropriate posture and supplied onto the mold, and the ring-shaped member is fitted into the cavity. Can be prevented. Further, by dropping the ring-shaped member from the position close to the mold without tilting, the ring-shaped member can be prevented from jumping up, and the ring-shaped member can be quickly held by the clamp mechanism. As a result, the cycle time of a series of operations in the apparatus can be shortened, and productivity can be improved.

  In the molded fitting device according to the fifth aspect, the pair of shutters of the shutter mechanism sandwich the outer peripheral surface of the ring-shaped member, and hold the ring-shaped member coaxially with the through hole of the moving member and thus the cavity. As a result, the ring-shaped member can be dropped with respect to the cavity without displacement, and the ring-shaped member can be more reliably positioned without displacement with respect to the cavity. Further, by sandwiching the outer peripheral surface of the ring-shaped member by the pair of shutters, the ring-shaped member can be dropped without deteriorating the posture as compared with the case where the bottom surface of the ring-shaped member is supported.

  In the molding / fitting device according to the sixth aspect, since the clamp mechanism and the shutter mechanism are operated in synchronization by rotating the rotary cam, it is necessary to separately provide a mechanism for operating the clamp mechanism and a mechanism for operating the shutter mechanism. It can be configured simply.

  In the molding / fitting device according to the seventh aspect, since the driving means rotates the rotary cam using a force for lowering the punch, there is no need to separately prepare a power source for operating the clamp mechanism and the shutter mechanism. It can be configured more simply. Further, since the rotary cam rotates as the punch descends and operates the clamp mechanism and the shutter mechanism, a series of operations can be performed quickly. Therefore, cycle time can be shortened and productivity can be improved. Further, as compared with a molding apparatus that performs only conventional molding, the molded body can be molded and the molded body and the ring-shaped member can be fitted in the same cycle time, and productivity is not reduced.

  In the molding fitting device according to claim 8, the latch mechanism can maintain the state in which the clamp mechanism holds the ring-shaped member by restricting the rotation of the rotary cam, and the ring-shaped member can be moved to a desired timing by releasing the restriction. Can be released.

  In the molding fitting apparatus according to claim 9, in the magazine of the supply means, a ring-shaped member is inserted so that a rod-shaped member having an outer diameter slightly smaller than the inner diameter of the ring-shaped member passes through the ring-shaped member and slides down from the rod-shaped member. A member is supplied to the holding means. Thereby, the ring-shaped member can be dropped in a stable posture and supplied to the shutter mechanism of the holding means.

  In the molding fitting apparatus according to claim 10, by moving the cylindrical member of the magazine into the through hole of the moving member, the through hole is moved coaxially with the ring-shaped member loaded in the magazine. The member can be moved. Accordingly, the ring-shaped member can be dropped without deviation from the through hole, and the ring-shaped member can be supplied to the shutter mechanism of the holding unit in an appropriate posture.

  According to this invention, the ring-shaped member can be positioned without deviation with respect to the cavity.

Embodiments of the present invention will be described below with reference to the drawings.
Referring to FIG. 1, a molding and fitting device 10 according to an embodiment of the present invention is a die float type press device for producing an annular yoke-integrated bonded magnet 200 as shown in FIG. 2. Used for. The yoke-integrated bond magnet 200 includes a ring-shaped (here, annular) bond magnet 202, which is an example of a molded body, and a spring-back on an annular back yoke 204, which is an example of a ring-shaped member. It is produced by using and fitting. As the back yoke 204, one having an inner diameter larger by several tens of μm (for example, about 30 μm) than an outer diameter of a cavity 58 (described later) is used.

  As shown in FIG. 1, the molding / fitting device 10 includes a dielina 12. A die / core integrated die 14 is inserted into the dilitter 12, and the die 14 is fixed to the die retainer 12 by a die presser 16. An upper punch guide post 18 is erected on the upper surface of the dilator 12, and the upper punch plate 20 is guided in the vertical direction (arrow Z direction) by the upper punch guide post 18.

  An upper punch washer 24 and an upper punch presser foot 26 for holding the upper punch 22 are provided on the bottom surface of the upper punch plate 20. The upper punch 22 is formed in a substantially cylindrical shape, and is configured by arranging a large diameter portion and a small diameter portion vertically. The upper punch 22 is pressed against the upper punch washer 24 by the upper punch presser 26 and fixed to the upper punch washer 24.

  Further, the upper punch plate 20 is provided with two pressing mechanisms 28 for operating a holding unit 74 (described later). The pressing mechanism 28 includes a rod-shaped member 30 inserted through the upper punch plate 20, a holding member 32 provided on the upper surface of the upper punch plate 20, and movably held in the arrow Z direction, and a lower end portion of the rod-shaped member 30. It includes a pressing member 34 provided, and a spring 36 that is disposed between the upper punch plate 20 and the pressing member 34 and through which the rod-shaped member 30 is inserted.

  Further, a press upper ram 38 is connected to the upper surface of the upper punch plate 20. The upper punch ram 38 moves the upper punch plate 20 in the direction of arrow Z, so that the upper punch 22 can be moved back and forth with respect to the cavity 58 (described later) of the mold 14, and the powder filled in the cavity 58 is pressed. Thus, the ring-shaped bonded magnet 202 can be obtained. Further, the two pressing mechanisms 28 can be moved in the arrow Z direction, and the holding unit 74 can be operated.

  As shown in FIGS. 3 and 4, the mold 14 includes a die 40 formed in a substantially cylindrical shape, a die lower plate 42 fixed to the bottom surface of the die 40, and a core fixed on the die lower plate 42. 44. The die 40 has a hole 46 having a circular cross section and a cavity 48 having a diameter larger than that of the hole 46 and communicating with the hole 46, and the core 44 is disposed in the hole 46 and the cavity 48. In the mold 14, the upper end surface of the core 44 and the upper surface of the die 40 are substantially flush.

  A lower punch holder 50 is disposed below the die 40. The shaft portion 50 a of the lower punch holder 50 is inserted into a through hole formed in the lower portion of the die lower plate 42 and the core 44 and faces the cavity portion 48 of the die 40. A lower punch washer 52, a lower punch 54, and a lower punch presser foot 56 are sequentially disposed on the upper end surface of the shaft portion 50a. The lower punch 54 formed in a substantially cylindrical shape is pressed against the lower punch washer 52 by the lower punch presser 56 and fixed on the lower punch washer 52.

  As shown in FIG. 4, in such a mold 14, the upper portion of the lower punch 54 faces the inside of the hole 46, so that the die 40, the core 44, and the lower punch 54 form a ring shape (here, an annular shape). The cavity 58 is formed.

  Returning to FIG. 1, the lower punch holder 50 is disposed on the lower punch holder washer 60, is pressed against the lower punch holder washer 60 by the lower punch holder presser 62, and is fixed on the lower punch holder 60. The lower punch holder washer 60 is fixed on a base plate 64 supported by legs (not shown). As a result, the lower punch 54 is fixed.

  Further, the bottom surface of the dilator 12 is connected to the lower connection base 68 via a pole 66 that passes through the base plate 64, and the lower connection base 68 is connected to the press lower ram 70. The die lowerer 12 can be moved in the direction of the arrow Z by the press lower ram 70, and die floating becomes possible.

  In addition, a rail 72 extending in a direction (arrow X direction) orthogonal to the arrow Z direction is provided on the upper surface of the dilator 12. Two rails 72 are provided side by side in a direction orthogonal to the arrow Z direction and the arrow X direction (arrow Y direction), and a holding unit 74 for holding the back yoke 204 is provided between the two rails 72 (FIG. 5).

  Further, a supply unit 76 for supplying the back yoke 204 to the holding unit 74 and a moving unit 78 for moving the holding unit 74 in the arrow X direction are provided on the upper surface of the dilator 12. The supply unit 76 is disposed between the mold 14 and the moving unit 78 to drop the back yoke 204 and supply it to the holding unit 74. That is, the back yoke 204 is dropped and supplied to the holding unit 74.

  The holding unit 74 is moved in the direction of the arrow X by the moving unit 78, and the upper punch 22 can be inserted through a through hole 94 (described later), or the back yoke 204 from the supply unit 76 can pass through the through hole 94. Placed in position. In FIG. 1, the holding unit 74 arranged at the press position is shown by a solid line, and the holding unit 74 arranged at the supply position is shown by a one-dot chain line.

Here, the holding unit 74 will be described in detail with reference to FIGS.
As shown in FIG. 5, the holding unit 74 as a holding means is formed in a rectangular frame shape and is held by two rails 72 so as to be movable in the arrow X direction, and is formed in a rectangular frame shape and a gap. And an inner frame 82 disposed in the outer frame 80 and a moving member 84 formed in a substantially rectangular plate shape and disposed in the inner frame 82 with a gap.

  As shown in FIG. 6, the inner frame 82 is mounted in the outer frame 80 via a plurality of (here, four) slide bearings 86. The slide bearing 86 includes a slider 86 a fixed to the inner peripheral surface of the outer frame 80 and a slider 86 b fixed to the bottom surface of the inner frame 82, so that the inner frame 82 can be moved in the outer frame 80 in the arrow X direction. Deploy. The moving member 84 is mounted in the inner frame 82 via a plurality of (here, four) slide bearings 88. The slide bearing 88 includes a slider 88 a fixed to the bottom surface of the inner frame 82 and a slider 88 b fixed to the bottom surface of the moving member 84, and the moving member 84 is disposed so as to be movable in the arrow Y direction within the inner frame 82. . As described above, the inner frame 82 is attached in the outer frame 80 and the moving member 84 is attached in the inner frame 82, so that the moving member 84 is movable in the arrow X direction and the arrow Y direction. That is, the moving member 84 can be arranged to be movable in the horizontal direction.

  As shown in FIGS. 7 and 8, a cylindrical portion 90 extending in the arrow Z direction is provided at the center of the moving member 84. The moving member 84 is formed with two guide holes 92a penetrating in the direction of the arrow Z and extending in the direction of the arrow X so as to be aligned in the direction of the arrow X with the cylindrical portion 90 interposed therebetween. In addition, two guide holes 92b extending in the arrow Y direction and extending to the inner frame 82 are formed to be aligned in the arrow Y direction with the cylindrical portion 90 interposed therebetween.

  The cylindrical portion 90 has a through hole 94 through which the upper punch 22 can be inserted when the holding unit 74 is in the press position and through which the back yoke 204 can pass when the holding unit 74 is in the supply position. The through hole 94 is formed in a circular cross section, and is configured by arranging a large diameter portion and a small diameter portion vertically. A plurality of (here, six) guide rollers 96 are provided along the inner peripheral surface in the vicinity of the upper end opening at the large diameter portion of the through hole 94.

  The rotary cam 100 is rotatably provided on the outer peripheral surface of the cylindrical portion 90 via a bearing 98. As shown in FIG. 5, the rotary cam 100 is formed with two guide holes 102a extending in the counterclockwise direction and on the peripheral side corresponding to the guide holes 92a of the moving member 84, and in the counterclockwise direction and in the center side. Two extending guide holes 102 b are formed corresponding to the guide holes 92 b of the moving member 84.

  Further, as shown in FIG. 6, on the bottom surface of the moving member 84, the back yoke 204 from the supply unit 76 (see FIG. 1) is received at the supply position and the back yoke 204 is attached to the die 40 at the press position (see FIG. 1). A shutter mechanism 104 for dropping down and a clamp mechanism 106 for holding the back yoke 204 on the die 40 are provided.

  The shutter mechanism 104 includes a pair of shutters 108 and a slide bearing 110. The pair of shutters 108 are attached to the bottom surface of the moving member 84 via two slide bearings 110, respectively, and are arranged to face each other in the direction of the arrow X so as to sandwich the lower end opening of the through hole 94. A support portion 108 a for supporting the lower end surface of the back yoke 204 is provided on each of the opposed surfaces of the pair of shutters 108. The slide bearing 110 includes a slider 110a fixed to the bottom surface of the moving member 84 and a slider 110b fixed to the top surface of the shutter 108, and arranges the shutter 110 so as to be movable in the arrow X direction.

  Further, on each upper surface of the pair of shutters 108, rod-like members 112 a that pass through the guide holes 92 a of the moving member 84 are erected. A bearing 113a is rotatably provided in the vicinity of the upper end of the rod-shaped member 112a, and the bearing 113a is fitted into the guide hole 102a of the rotary cam 100. As a result, the pair of shutters 108 and the rotary cam 100 are connected to each other, and the pair of shutters 108 can be moved in the direction of the arrow X and approaching each other or in the direction of the arrow X and away from each other as the rotary cam 100 rotates. That is, as the rotary cam 100 rotates, the pair of shutters 108 of the shutter mechanism 104 can be opened and closed in the arrow X direction.

  The clamp mechanism 106 includes a pair of clampers 114 and a slide bearing 116. The pair of clampers 114 are attached to the bottom surface of the moving member 84 via two slide bearings 116, respectively, and are arranged to face each other in the arrow Y direction so as to sandwich the lower end opening of the through hole 94. A pressure contact portion 114 a that is in pressure contact with the outer peripheral surface of the back yoke 204 is provided on the opposing surface side of the pair of clampers 114, and the pressure contact portion 114 a contacts the upper end surface of the back yoke 204 so as not to face the inside of the back yoke 204. A protrusion 114b is provided. The slide bearing 116 includes a slider 116a fixed to the bottom surface of the moving member 84 and a slider 116b fixed to the side surface of the clamper 114, and arranges the clamper 114 so as to be movable in the arrow Y direction.

  Further, on each of the upper surfaces of the pair of clampers 114, rod-like members 112b that pass through the guide holes 92b of the moving member 84 are erected. A bearing 113b is rotatably provided in the vicinity of the upper end portion of the rod-shaped member 112b, and the bearing 113b is fitted into the guide hole 102b of the rotary cam 100. As a result, the pair of clampers 114 and the rotary cam 100 are connected to each other, and the pair of clampers 114 can be moved in the direction indicated by the arrow Y and close to each other or in the direction indicated by the arrow Y and separated from each other as the rotary cam 100 rotates. That is, as the rotary cam 100 rotates, the pair of clampers 114 of the clamp mechanism 106 can be opened and closed in the arrow Y direction.

  As shown in FIG. 9, the holding unit 74 is provided with a drive mechanism 118 for rotating the rotary cam 100. The drive mechanism 118 includes a base plate 120 fixed to the upper surface of the moving member 84, a guide post 122 standing on the base plate 120, a cover plate 124 fixed to the upper end of the guide post 122, the base plate 120 and the cover plate 124, A movable plate 126 arranged between the movable plate 126 and guided in the direction of arrow Z by a guide post 122, a rotary shaft 128 inserted through the movable plate 126, a gear 130 provided on the rotary shaft 128 and engaged with the rotary cam 100, and a base plate 120. A spring 132 is disposed between the plate 126 and the guide post 122 is inserted.

  The rotating shaft 128 is inserted into the screw hole 126a of the moving plate 126, and engages with a screw thread (not shown) formed on the inner peripheral surface of the screw hole 126a with a screw thread (not shown) formed on the outer peripheral surface. The moving plate 126 is supported by the spring 132 and moves downward in the direction of the arrow Z when the two pressed members 126b formed on the upper surface are pressed by the pressing member 34 of the pressing mechanism 28, respectively. Along with this, the rotating shaft 128 and the gear 130 rotate to rotate the rotary cam 100 at a predetermined angle. In this embodiment, the two pressing mechanisms 28 and the driving mechanism 118 constitute a driving means.

  Incidentally, in the pressing mechanism 28, the spring 36 contracts as the upper punch plate 20 descends, and the pressing member 34 is urged downward in the arrow Z direction, thereby pressing the pressed member 126b. Normally, the powder in the cavity 58 is pressed at a pressure of several tens of t. However, if such a large pressure is directly applied to the pressed member 126b, the drive mechanism 118 may be broken. Therefore, a spring that biases the pressing member 34 to the extent that the drive mechanism 118 is not broken is used as the pressing mechanism 28 as the spring 36.

  When the drive mechanism 118 rotates the rotary cam 100 by pressing by the pressing mechanism 28, the pair of shutters 108 of the shutter mechanism 104 and the pair of clampers 114 of the clamp mechanism 106 operate in synchronization. Specifically, in the holding unit 74 arranged at the press position, the rotary cam 100 is rotated clockwise from the state shown in FIG. 5 to the state shown in FIG. 10, thereby opening the pair of shutters 108 and the pair of clampers 114. Closes. As a result, the back yoke 204 can be dropped and supplied onto the die 40 (see FIG. 1) from the pair of shutters 108, and the back yoke 204 can be held on the die 40 by the pair of clampers 114.

  As can be seen from FIG. 11, the pair of clampers 114 hold the back yoke 204 so that the center of the through hole 94 and the center of the back yoke 204 (indicated by the alternate long and short dash line) coincide with the arrow Z direction. That is, the pair of clampers 114 hold the back yoke 204 coaxially with the through hole 94.

  Further, as shown in FIG. 5, a latch mechanism 134 that restricts the rotation of the rotary cam 100 is provided at the upper corner of the moving member 84. The latch mechanism 134 is formed in the shape of a prism that bends in an arc shape and is fixed to the upper surface of the rotary cam 100. And a spring 142 for connecting the mounting table 138 and the lever 140 to each other. A roller 140 a is provided at one end of the lever 140, and the spring 142 biases the lever 140 so that the roller 140 a is pressed against the side surface of the guide 136.

  In such a latch mechanism 134, when the rotary cam 100 rotates clockwise from the state shown in FIG. 5, the guide 136 moves, and the roller 140a of the lever 140 rolls on the side surface of the guide 136. Then, as shown in FIG. 10, the roller 140 a is caught by the corner portion of the guide 136 when the rotary cam 100 rotates by a predetermined angle. In the driving mechanism 118, when the pressing by the pressing mechanism 28 is released, the moving plate 126 biased by the spring 132 tends to move upward in the arrow Z direction. That is, the drive mechanism 118 attempts to restore the rotary cam 100 from the state shown in FIG. 10 to the state shown in FIG. 5 by releasing the press. However, the rotation of the rotary cam 100 can be restricted by the roller 140 a of the lever 140 being caught by the guide 136. That is, the latch mechanism 134 can maintain the state in which the pair of clampers 114 hold the back yoke 204 and thus the yoke-integrated bond magnet 200 after pressing, and the yoke-integrated bond magnet 200 can be released at a desired timing (position). In this embodiment, a pressing member 143 for pressing the other end of the lever 140 is provided on the dilatina 12, and the yoke-integrated bonded magnet 200 is released at the supply position (see FIG. 1). The yoke-integrated bonded magnet 200 released at the supply position is discharged to the outside of the molding / fitting device 10 by a shooter (not shown).

  Returning to FIG. 1, the supply unit 76 as supply means includes a main body 144, a magazine 146 held by the main body 144 and loaded with a plurality of back yokes 204 in the direction of the arrow Z, and a bottom 1 loaded in the magazine 146. A pair of shutters 148 that support the bottom surface of the second back yoke 204 and a pair of clampers 150 that sandwich the outer peripheral surface of the second back yoke 204 from the bottom are included.

  The magazine 146 has a rod-shaped member 152 having an outer diameter slightly smaller than the inner diameter of the back yoke 204 and inserted through the plurality of back yokes 204, and is formed in a cylindrical shape having an outer diameter substantially the same diameter as the upper punch 22. A rod-shaped member 152 and a cylindrical member 154 arranged coaxially so as to cover the outer peripheral surface of the back yoke 204 through which the member 152 is inserted are included. The magazine 146 is held by moving arms 155a and 155b provided to be movable in the arrow Z direction by a drive mechanism (not shown) provided in the main body 144. The moving arm 155a clamps the outer peripheral surface of the rod-shaped member 152 and the vicinity of the upper end portion, and the moving arm 155b clamps the outer peripheral surface of the cylindrical member 154 and the vicinity of the central portion.

  In such a supply unit 76, the pair of shutters 148 is opened with the pair of clampers 150 sandwiching the second back yoke 204 from the bottom. As a result, the first back yoke 204 from the bottom slides down between the rod-shaped member 152 and the cylindrical member 154 and is supplied to the holding unit 74 by dropping.

  The moving unit 78 as moving means includes a crank 156, a motor 158 that rotates the crank 156, and a shaft 160 that connects the crank 156 and the holding unit 74. In the moving unit 78, by rotating the crank 156, the shaft 160 is pulled in one direction in the arrow X direction (the right side in FIG. 1), and the holding unit 74 is moved from the press position to the supply position. Further, by rotating the crank 156, the shaft 160 is pushed out to the other side in the arrow X direction (left side in FIG. 1), and the holding unit 74 is moved from the supply position to the press position.

Next, the main operation of the molded fitting device 10 will be described.
First, the drive mechanism provided in the main body 144 of the supply unit 76 moves the magazine 146 downward in the arrow Z direction with the holding unit 74 disposed at the supply position. As a result, the cylindrical member 154 enters the large diameter portion of the through hole 94, and the guide roller 96 contacts the outer peripheral surface of the cylindrical member 154. Accordingly, the moving member 84 moves so that the through hole 94 is positioned coaxially with the back yoke 204 loaded in the magazine 146. Then, as shown in FIG. 12, the first back yoke 204 from the bottom of the magazine 146 is dropped and supplied onto the support portions 108 a of the pair of shutters 108. At this time, the cavity 58 of the mold 14 is filled with a bond magnet powder which is a material of the ring-shaped bond magnet 202 by a feeder box (not shown).

  Subsequently, after the magazine 146 is moved upward in the arrow Z direction, the holding unit 74 is moved to the press position, and the upper punch 22 and the pressing member 34 of the pressing mechanism 28 are lowered. Accordingly, the moving plate 126 is pressed downward in the arrow Z direction by the pressing member 34, the rotary cam 100 rotates, and the back yoke 204 is dropped and supplied onto the die 40. Thereafter, the small diameter portion of the upper punch 22 enters the large diameter portion of the through hole 94.

  As shown in FIG. 13, the lowering of the pressing member 34 proceeds and the rotation of the rotary cam 100 proceeds, whereby the back yoke 204 is held by the pair of clampers 114. Further, as the upper punch 22 descends and the large diameter portion of the upper punch 22 enters the large diameter portion of the through hole 94, the guide roller 96 comes into contact with the outer peripheral surface of the upper punch 22. As a result, the moving member 84 moves so that the through hole 94 is positioned coaxially with the cavity 58, and the back yoke 204 held by the pair of clampers 114 is positioned coaxially with the upper punch 22 and the cavity 58. Thereafter, as shown in FIG. 14, the upper punch 22 passes through the back yoke 204, and the powder in the cavity 58 is pressed by the upper punch 22 and the lower punch 54, and the ring-shaped bond magnet 202 is formed in the cavity 58. The

  Subsequently, by moving the dilator 12 downward in the direction of the arrow Z, as shown in FIG. 15, the ring-shaped bond magnet 202 sandwiched between the upper punch 22 and the lower punch 54 is exposed from the cavity 58 and moved downward. The back yoke 204 is moved by a spring back.

  Thereafter, the upper punch 22 and the dilator 12 are moved upward in the arrow Z direction, and the holding unit 74 is moved to the supply position. As the holding unit 74 moves to the supply position, the lever 140 of the latch mechanism 134 is pressed by the pressing member 143, the lever 140 rotates against the biasing force of the spring 142, and the rotary cam 100 rotates counterclockwise. As a result, the pair of clampers 144 is opened at the supply position, and the yoke-integrated bonded magnet 200 is released and discharged by the shooter. Further, the pair of shutters 108 are closed, and the back yoke 204 can be received.

  According to such a forming and fitting apparatus 10, when the powder is pressed, the upper punch 22 enters the through hole 94 of the moving member 84, so that the through hole 94 is positioned coaxially with the cavity 58. The member 84 moves. Accordingly, the back yoke 204 held coaxially with the through hole 94 by the pair of clampers 114 moving together with the moving member 84 is positioned coaxially with the cavity 58. Therefore, even if the dimensional difference (clearance) between the outer diameter of the cavity 58 and the inner diameter of the back yoke 204 is about several tens of micrometers, the back yoke 204 can be positioned with high accuracy and without deviation. Thereby, it is possible to prevent the back yoke 204 from being galled.

  Each of the pair of clampers 114 is in contact with the upper end surface of the back yoke 204 at the protrusion 114b, so that the back yoke 204 can be prevented from shifting upward when the ring-shaped bond magnet 202 is fitted to the back yoke 204. The bonded magnet 202 can be properly fitted to the back yoke 204.

  The pair of shutters 108 of the shutter mechanism 104 receives the back yoke 204 dropped and supplied at the supply position by the support portion 108a, and drops the back yoke 204 onto the die 40 at the press position. Accordingly, the back yoke 204 can be disposed on the die 40 without dragging on the die 40, and the back yoke 204 can be prevented from being fitted into the cavity 58.

  A pair of shutters 108 holds the back yoke 204 below the lower end opening of the through hole 94. By holding the ring-shaped member at a position close to the die 40 in this manner, the back yoke 204 can be dropped on the die 40 in an appropriate posture, and the back yoke 204 is fitted into the cavity 58. Can be prevented. Further, the back yoke 204 can be prevented from jumping up by dropping the back yoke 204 from a low position with respect to the die 40 without tilting. Thereby, the pair of clampers 114 can quickly hold the ring-shaped member, the cycle time of a series of operations can be shortened, and the productivity can be improved.

  Since the clamp mechanism 106 and the shutter mechanism 104 are operated in synchronization by rotating the rotary cam 100, it is not necessary to separately provide a mechanism for operating the clamp mechanism 106 and a mechanism for operating the shutter mechanism 104, and the configuration can be simplified. . Further, since the rotary cam 100 rotates as the upper punch 22 descends and operates the clamp mechanism 106 and the shutter mechanism 104, the fall supply of the back yoke 204 and the holding of the back yoke 204 can be performed quickly. Therefore, cycle time can be further shortened and productivity can be improved. In addition, compared to a molding apparatus that performs only conventional molding, the ring-shaped bonded magnet 202 can be molded and the ring-shaped bonded magnet 202 and the back yoke 204 can be fitted with an equivalent cycle time. There is no reduction.

  Since the drive mechanism 118 rotates the rotary cam 100 by the pressing of the pressing mechanism 28, it is not necessary to separately prepare a power source for operating the clamp mechanism 106 and the shutter mechanism 104, and the configuration can be simplified.

  By sliding the back yoke 204 from the rod-shaped member 152 in the magazine 146, the back yoke 204 can be dropped in a stable posture, and the back yoke 204 can be supplied to the shutter mechanism 104 of the holding unit 74 in an appropriate posture.

  By moving the cylindrical member 154 of the magazine 146 into the through hole 94, the moving member 84 can be moved so that the through hole 94 is positioned coaxially with the back yoke 204 loaded in the magazine 146. As a result, the back yoke 204 can be dropped without deviation from the through hole 94, and the back yoke 204 can be supplied to the shutter mechanism 104 of the holding unit 74 in an appropriate posture.

  Note that the shutter used in the shutter mechanism is not limited to the shutter 108 described above. For example, as in the holding unit 74a shown in FIG. 16, the outer peripheral surface of the back yoke 204 (shown by a one-dot chain line) is sandwiched by a pair of shutters 108a each having two arms 109, and the back yoke 204 is coaxial with the through hole 94. You may make it hold | maintain on. According to the shutter mechanism 104a including such a pair of shutters 108a, the back yoke 204 can be dropped and supplied to the cavity 58 without deviation, and the back yoke 204 can be more reliably positioned with respect to the cavity 58 without deviation. Further, by sandwiching the outer peripheral surface of the back yoke 204 by the pair of shutters 108a, the back yoke 204 can be dropped without deteriorating the posture as compared with the case where the bottom surface of the back yoke 204 is supported.

  Moreover, it is preferable that the position of each component of the holding units 74 and 74a can be finely adjusted using a push screw or the like. By making it possible to finely adjust the position of each component of the holding unit 74, the assembly accuracy of the holding units 74 and 74a can be improved. As a result, the back yoke 204 can be positioned with higher accuracy.

  Moreover, although the above-mentioned embodiment demonstrated the case where the ring-shaped bond magnet 202 was obtained as a molded object, the shape of a molded object is not limited to this. For example, the molded body may be formed in a disk shape. Moreover, you may make it form a molded object in a cross-sectional polygonal shape. In this case, a ring-shaped member having a shape corresponding to the outer shape of the molded body is used.

  Furthermore, although the above-mentioned embodiment demonstrated the shaping | molding fitting apparatus 10 of the die floating system, this invention is not limited to this. For example, the upper punch and the lower punch may be moved in the vertical direction.

It is an illustration figure which shows one Embodiment of this invention. It is a perspective view solution figure which shows an example of a yoke integrated bond magnet. It is a perspective view solution figure when a metal mold | die cut | disconnects in the vertical direction. It is a cross-sectional schematic solution figure which shows a metal mold | die. It is a top view solution figure which shows a holding | maintenance unit. It is a bottom view solution figure which shows a holding | maintenance unit. It is A1-A1 (FIG. 5) sectional illustration solution of a holding | maintenance unit. It is A2-A2 (FIG. 5) sectional illustration solution figure of a holding | maintenance unit. It is a side view solution figure of a holding unit. It is a top view solution figure which shows the holding | maintenance unit of a state with which a pair of clamper was closed. It is a bottom view solution figure showing a maintenance unit in a state where a pair of clampers were closed. It is an illustration figure which shows the supply aspect of the back yoke to the holding | maintenance unit by a supply unit. It is an illustration figure which shows the positioning aspect of a back yoke. It is an illustration figure which shows the press aspect of the powder with which it filled in the cavity. It is an illustration figure which shows the fitting aspect of the ring-shaped bond magnet to a back yoke. It is a bottom view solution figure which shows the holding | maintenance unit in which the shutter of another example is used.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Molding fitting apparatus 22 Upper punch 28 Press mechanism 30,112a, 112b, 152 Bar-shaped member 74,74a Holding | maintenance unit 76 Supply unit 78 Moving unit 84 Moving member 86,88,110,116 Slide bearing 94 Through-hole 100 Rotary cam 104, 104a Shutter mechanism 106 Clamp mechanism 108, 108a Shutter 114 Clamper 114a Pressure contact portion 114b Projection portion 118 Drive mechanism 134 Latch mechanism 146 Magazine 154 Cylindrical member 202 Ring-shaped bond magnet 204 Back yoke

Claims (11)

A molding fitting device for molding a molded body and fitting the molded body to a ring-shaped member,
The mold in which the cavity is formed,
A punch for pressing the powder provided coaxially with the cavity above the mold and filling the cavity to obtain the molded body, and holding means for holding the ring-shaped member,
The holding means has a through-hole through which the punch is inserted, and a moving member that moves so that the through-hole is positioned coaxially with the cavity when the punch enters the through-hole, and the moving member And a clamp mechanism for holding the ring-shaped member coaxially with the through-hole on the mold and movably provided on the moving member. The clamp mechanism includes a pair of clampers that sandwich the outer peripheral surface of the ring-shaped member,
2. The pair of clampers each include a pressure contact portion that is in pressure contact with an outer peripheral surface of the ring-shaped member, and a protrusion portion that is in contact with an upper end surface of the ring-shaped member so as not to face the inside of the ring-shaped member. The molding fitting apparatus described in 1. A supply means for dropping the ring-shaped member so as to pass through the through-hole and supplying the ring-shaped member to the holding means; and a press position where the punch can be inserted through the through-hole or the ring-shaped by the supply means A moving means for moving the holding means to position the holding means at a supply position to which a member is supplied;
The holding means further includes a shutter mechanism for receiving the ring-shaped member from the supply means at the supply position and dropping the ring-shaped member onto the mold at the press position. The molding fitting apparatus described in 1.   The shaping | molding fitting apparatus of Claim 3 with which the said shutter mechanism hold | maintains the said ring-shaped member below the lower end opening part of the said through-hole.   The molding fitting device according to claim 3, wherein the shutter mechanism includes a pair of shutters that hold the ring-shaped member coaxially with the through hole by sandwiching an outer peripheral surface of the ring-shaped member.   The molding fitting apparatus according to claim 3, wherein the holding unit further includes a rotary cam for operating the clamp mechanism and the shutter mechanism in synchronization.   The shaping | molding fitting apparatus of Claim 6 which further includes the drive means which rotates the said rotary cam using the force which descends the said punch.   The molding fitting apparatus according to claim 7, wherein the holding unit further includes a latch mechanism for restricting the rotation of the rotary cam in a state where the ring-shaped member is held by the clamp mechanism. The supply means includes a magazine loaded with the ring-shaped member,
The molding and fitting apparatus according to claim 3, wherein the magazine includes a rod-shaped member that has an outer diameter slightly smaller than an inner diameter of the ring-shaped member and is inserted through the ring-shaped member.   The molding fitting device according to claim 9, wherein the magazine further includes a cylindrical member that is arranged coaxially with the rod-shaped member and covers an outer peripheral surface of the ring-shaped member through which the rod-shaped member is inserted. The ring-shaped member in a molding fitting device for obtaining a molded body by pressing the powder filled in the cavity with a punch provided coaxially with the cavity of the mold, and fitting the molded body into the ring-shaped member The positioning method of
The ring is moved coaxially with the through hole by a clamp mechanism provided in the moving member by moving the moving member by causing the punch to enter a through hole provided in the moving member when pressing the powder. A positioning method for positioning a shaped member coaxially with the cavity.

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