Setting device

Abstract

To automate the setting of connecting rods when using a rotor core holding jig and improve the production efficiency of a magnet-embedded core.SOLUTION: A setting device includes a base 42 on which a rotor core holding jig 10 is placed, an opposing stand 46 coupled to the base 42 and facing the base 42, a pressurizing device 48 that is provided on the opposing stand 46 and pressurizes an upper plate 14 of the rotor core holding jig 10 on the base 42 toward a lower plate 12, a chuck device 126 that is provided on the base 42 and grip each connecting rod 30 in a detachable manner, and that is movable between a separation position where the connecting rod 30 is separated from engaging grooves 32 and 34 and an engagement position where the connecting rod 30 is engaged with the engaging grooves 32 and 34, and a fluid pressure cylinder device 120 provided on the base 42 and driving each chuck device 126 between the separation position and the engagement position.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a setting device and a setting method for a rotor core holding jig, and more particularly to a setting device for a rotor core holding jig used in the manufacture of embedded magnet cores. [Background technology]

[0002] A known embedded magnet core used in rotating electric machines such as electric motors is a resin-sealed type core that includes a rotor core with a magnet insertion hole having openings on both axial end faces, magnet pieces arranged in the magnet insertion hole, and resin filled in the magnet insertion hole to fix the magnet pieces to the rotor core.

[0003] A known manufacturing device for this type of embedded magnet core is a resin molding device that has a fixed mold and a movable mold facing each other, pressurizes the rotor core in the axial direction using the fixed mold and the movable mold, and fills the magnet insertion hole with molten resin from a resin pot provided in the fixed mold or the movable mold (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-79056 A [Patent Document 2] JP 2017-7353 A Summary of the Invention [Problem to be solved by the invention]

[0005] In manufacturing embedded magnet cores using the above-mentioned resin molding apparatus, the same applicant as the present application has considered using a rotor core holding jig that has opposing first and second plates and a connecting rod that connects the first and second plates to each other by engaging with notched engaging grooves that open toward the periphery of the first and second plates and abutting the flange portions at both ends against each of the first and second plates, and that pre-clamps the rotor core that is placed between the first and second plates (PCT / JP2018 / 037977).

[0006] The present invention aims to automate the setting of connecting rods when using the above-mentioned rotor core holding jig, thereby improving the production efficiency of embedded magnet cores. [Means for solving the problem]

[0007] A setting device according to one embodiment of the present invention is a setting device for a rotor core holding jig having a first plate and a second plate facing each other, and a connecting rod that connects the first plate and the second plate to each other by engaging with a notched engagement groove opening on the periphery of the first plate and the second plate and abutting flange portions at both ends against each of the first plate and the second plate, wherein a rotor core is placed between the first plate and the second plate, and the setting device has a base on which the rotor core holding jig is placed, an opposing base connected to the base and facing the base, a pressure device attached to the opposing base and pressurizing the second plate of the rotor core holding jig on the base toward the first plate, a chuck device attached to the base and holding each connecting rod, and capable of moving between a separation position where the connecting rod is separated from the engagement groove and an engagement position where the connecting rod engages with the engagement groove, and a drive device provided on the base and driving each chuck device between the separation position and the engagement position.

[0008] According to this configuration, the setting of the connecting rods is automated, improving the production efficiency of the embedded magnet cores.

[0009] In the setting device according to the above-described embodiment, preferably, the rotor core includes a magnet insertion hole having openings on both end faces in the axial direction, the first plate includes a gate communicating with one of the openings of the magnet insertion hole, the rotor core holding jig further has a blocking member connected to the second plate via a compression spring member and abutting one of the end faces of the rotor core to block the other opening of the magnet insertion hole, and the connecting rod has an axial length connecting the first plate and the second plate to each other so that the spring force of the compression spring member becomes a predetermined value when the blocking member blocks the opening.

[0010] According to this configuration, the axial compressive force acting on the rotor core does not become unnecessarily large, and the blocking member properly blocks the opening of the magnet insertion hole by the spring force of the compression spring member.

[0011] In the setting device according to the above-described embodiment, preferably, the first plate and the second plate are each rectangular and have the engagement grooves corresponding to at least two sides that are parallel to each other, and the chuck device is provided corresponding to each of at least the two sides of the first plate and the second plate of the rotor core holding jig placed on the base.

[0012] According to this configuration, the first plate and the second plate are reliably connected by the connecting rods engaging with the respective engagement grooves, and the setting of each connecting rod is automated.

[0013] In the setting device according to the above-described embodiment, preferably, the chuck device is movable to an operating position which is located at a position corresponding to between the base and the opposing base and can move between the separated position and the engaged position, and to a retracted position which does not interfere with the rotor core holding jig which is loaded into and loaded out of the base.

[0014] According to this configuration, the rotor core holding jig can be efficiently carried in and out of the base without interfering with the chuck device.

[0015] In the setting device according to the above-described embodiment, preferably, the base and the opposing table are spaced apart in the vertical direction and opposed to each other, the second plate located on the upper side has an outer contour larger than that of the first plate located on the lower side, and the connecting rod is supported in a suspended state by engaging only with the engaging groove of the second plate when not gripped by the chuck device.

[0016] According to this configuration, the handling step of the connecting rod with respect to the first plate and the second plate is not required, and working efficiency is improved. Effect of the Invention

[0017] As described above, according to this embodiment, when using a rotor core holding jig, the setting of the connecting rods can be automated, and the production efficiency of embedded magnet cores can be improved. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view showing an example of an embedded magnet core to which a setting device for a rotor core holding jig according to an embodiment of the present invention is applied; [Diagram 2] A longitudinal cross-sectional view of the embedded magnet core [Diagram 3] FIG. 3 is a longitudinal sectional view of a rotor core holding jig used in the present embodiment (a sectional view taken along line III-III in FIG. 4). [Figure 4] FIG. 3 is a plan view of a rotor core holding jig used in the present embodiment; [Diagram 5] FIG. 1 is a front view showing a retracted state of a setting device for a rotor core holding jig according to an embodiment of the present invention; [Figure 6] FIG. 13 is a front view showing the setting device in a chuck-separated state; [Figure 7] FIG. 11 is a front view showing a chuck engagement state of the setting device; [Figure 8] FIG. 3 is a plan view of a chuck device of the setting device; [Figure 9] 13 is a front view of a rotor core holding jig setting device according to another embodiment of the present invention; [Figure 10] FIG. 13 is a vertical cross-sectional view showing a state in which a lower movable member of the resin molding device for the embedded magnet core is lowered. [Figure 11] FIG. 11 is a vertical cross-sectional view showing a state in which a lower movable member of the resin mold manufacturing apparatus is raised. [Figure 12] FIG. 11 is a vertical cross-sectional view showing the resin pressurizing state of the resin mold manufacturing device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] A preferred embodiment of the present invention will now be described with reference to the accompanying drawings.

[0020] First, an embedded magnet core 1 manufactured using a setting device for a rotor core holding jig according to an embodiment of the present invention will be described with reference to Figs.

[0021] The embedded magnet core 1 is a component of a rotating electric machine such as a motor, and includes a rotor core 2. The rotor core 2 is a laminated core in which multiple electromagnetic steel sheets are stacked and joined together by a known joining method (crimping, welding, adhesive, etc.), has a roughly circular ring shape in a plan view, and has a shaft hole 3 that passes through in the axial direction at the center.

[0022] A plurality of magnet insertion holes 4 are formed in the rotor core 2. Each magnet insertion hole 4 forms a substantially rectangular parallelepiped space, penetrates the rotor core 2 in the axial direction, and opens to a lower end face 2A and an upper end face 2B that form both end faces of the rotor core 2. In other words, each magnet insertion hole 4 is a through hole having openings at both end faces in the axial direction of the rotor core 2. In the illustrated example, the magnet insertion holes 4 are arranged at four positions equally spaced apart in the circumferential direction of the rotor core 2, but the shape, number, arrangement, etc. of the magnet insertion holes 4 are not limited to this and various modifications are possible.

[0023] Each magnet insertion hole 4 houses a magnet piece 5 having a substantially rectangular parallelepiped shape. The magnet piece 5 can be made of a permanent magnet (including a magnetized magnet), such as a sintered ferrite magnet piece or a neodymium magnet piece. The dimensions of each part of the magnet piece 5 are set smaller than the dimensions of each part of the magnet insertion hole 4. This leaves a gap between the rotor core 2 and the magnet piece 5 inside the magnet insertion hole 4. Resin 6 is filled into this gap. Each magnet piece 5 is fixed to the rotor core 2 by the resin 6 filled into the gap. A thermosetting resin such as epoxy resin can be used as the resin 6.

[0024] 1, for example, each magnet piece 5 is arranged biased inward (toward the center of the rotor core 2) in the magnet insertion hole 4, and the outer surface facing the center of the rotor core 2 abuts against the inner surface of the magnet insertion hole 4 that faces the outer surface. This ensures that the radial arrangement position of each magnet piece 5 on the rotor core 2 is uniformly determined, and coupled with the magnet insertion holes 4 being provided at equal intervals in the circumferential direction of the rotor core 2, the magnet pieces 5 do not become a cause of imbalance in the rotational direction of the rotor core 2. Note that each magnet piece 5 may also be arranged biased on the opposite side (to the outer periphery of the rotor core 2) to the position shown in FIG. 1.

[0025] Next, a rotor core holding jig 10 used in manufacturing the embedded magnet core will be described with reference to FIGS.

[0026] The rotor core holding jig 10 has a lower plate (first plate) 12 and an upper plate (second plate) 14 facing each other.

[0027] The lower plate 12 is a rectangular flat plate, and the rotor core 2 is placed on it so that the flat lower end surface 2A contacts the flat upper surface 12A. The lower plate 12 includes gates 20 that individually communicate with the lower openings (one opening) 4A of each magnet insertion hole 4, and cull openings 22 that communicate with each gate 20 and each resin pot 80 of a resin molding device 60 described later.

[0028] The upper plate 14 is a rectangular flat plate and faces the upper end surface 2B of the rotor core 2. The upper plate 14 supports a blocking member 26 for each magnet insertion hole 4 in a suspended manner by a bolt 24 so that the blocking member 26 can move up and down. Each blocking member 26 has an area larger than the upper opening (the other opening) 4B of the magnet insertion hole 4 and includes a flat lower surface 26A that can abut against the flat upper end surface 2B of the rotor core 2. The lower limit position of each blocking member 26 is determined by the head 24A of the bolt 24 abutting against the shoulder-shaped bottom of the bolt-through hole 14A formed in the upper plate 14.

[0029] A compression coil spring 28 is attached between the upper plate 14 and each blocking member 26. The compression coil spring 28 is provided for each blocking member 26, and biases each blocking member 26 toward the lower plate 12. In the illustrated embodiment, the blocking member 26 and the compression coil spring 28 are provided for each magnet insertion hole 4, but they may be provided for each of a plurality of adjacent magnet insertion holes 4.

[0030] The upper plate 14 has an outer contour larger than that of the lower plate 12, and includes a rectangular frame-shaped protruding portion 15 that protrudes outward from the outer edge of the lower plate 12 in a plan view.

[0031] The lower plate 12 and the upper plate 14 are connected to each other by connecting rods 30 extending vertically at four locations on the front, rear, left and right sides, with the rotor core 2 sandwiched between the lower plate 12 and the closing member 26.

[0032] A detailed description will be given of the structure of the connection between the lower plate 12 and the upper plate 14 by the connecting rods 30. Each connecting rod 30 includes a rod-shaped portion 30A and flange portions 30B, 30C provided on both upper and lower ends of the rod-shaped portion 30A.

[0033] The lower plate 12 and the upper plate 14 each have a notched engagement groove 32, 34 extending linearly in the left-right direction and opening to the parallel left and right outer edges (peripheries) of the plates 12, 14. The engagement grooves 32, 34 correspond to two parallel sides (left and right sides) of the lower plate 12 and the upper plate 14, respectively, and are provided so as to be aligned vertically. As shown in the partially enlarged perspective views (A) and (B) in Fig. 3, each includes a recessed groove 32A with which the flange portions 30B, 30C of the connecting rod 30 can be engaged, and slit-like openings 32B, 34B provided at the bottom of the recessed groove 34A through which the rod-shaped portion 30A can pass, and the flange portions 30B, 30C abut against shoulder portions 32C, 34C formed by the bottom portions of the recessed groove 32A and the recessed groove 34A remaining on both sides of the openings 32B, 34B.

[0034] In this manner, each connecting rod 30 engages with the lower plate 12 and the upper plate 14, so that the spring force of each compression coil spring 28 is a predetermined value. The spring force of the compression coil spring 28 (the amount of deflection of the compression coil spring 28) generated in this connected state is set to an appropriate value by the axial length of the rod-shaped portion 30A.

[0035] As a result, each blocking member 26 is pressed against the upper end surface 2B of the rotor core 2 by the spring force of the compression coil spring 28, blocking the upper opening 4B of the corresponding magnet insertion hole 4.

[0036] The flange portions 30B, 30C are entirely housed in the recessed grooves 32A, 34A and do not protrude below the lower plate 12 or above the upper plate 14. This configuration is not essential, and depending on the plate configuration, the recessed grooves 32A, 34A may be omitted and the flange portions 30B, 30C may protrude below the lower plate 12 or above the upper plate 14.

[0037] Each connecting rod 30 is positioned in the protruding portion 15 of the upper plate 14, as shown by phantom lines in Figure 3, so that when not gripped by the chuck device 126 described below, it does not engage with the engagement groove 32 of the lower plate 12, but only engages with the engagement groove 34 of the upper plate 14, and is supported in a suspended state by the upper plate 14.

[0038] As a result, each connecting rod 30 is always supported by being suspended from the upper plate 14 and selectively engages with the engaging groove 32 of the lower plate 12 by moving left and right, eliminating the need for a handling process of the connecting rod 30 relative to the lower plate 12 and the upper plate 14, improving work efficiency.

[0039] Bases (lower ends) 36A of plate pressing rods 36 are fixed to the lower plate 12 at two locations spaced apart from each other in the left-right and front-rear directions. The plate pressing rods 36 extend vertically upward from the lower plate 12, pass through through holes 38 formed in the upper plate 14 in a loose-fitting state, and include free ends (upper ends) 36B located above the upper plate 14. The locations at which the plate pressing rods 36 are arranged are not limited to two, and may be multiple locations of more than two locations.

[0040] By using the above-mentioned rotor core holding jig 10, the axial compressive force acting on the rotor core 2 does not become unnecessarily large, and the blocking member 26 properly blocks the opening 4B of the magnet insertion hole 4 by the spring force of the compression coil spring 28.

[0041] Next, a setting device 40 that sets the rotor core 2 in the rotor core holding jig 10 will be described with reference to FIGS.

[0042] The setting device 40 has a flat base 42, a flat opposing table 46 arranged above the base 42 at a distance from each other by a plurality of post members 44 erected from the base 42, a fluid pressure type pressurizing device (cylinder-piston device) 48 attached to the opposing table 46, and a flat pressure plate 52 attached to a piston rod 50 of the pressurizing device 48. The pressurizing device 48 uses the pressurizing plate 52 to pressurize the upper plate 14 of the rotor core holding jig 10 placed on the base 42 toward the lower plate 12.

[0043] On both the left and right sides of the base 42, there are provided lifting tables 112 that are guided by guide rails 110 and can move up and down. Each lifting table 112 moves up and down by a feed screw 116 driven by an electric motor 114. A cylinder mounting plate 118 is attached to each lifting table 112. A fluid pressure cylinder device (drive device) 120 is attached to each cylinder mounting plate 118. Each fluid pressure cylinder device 120 has a piston rod 122 that extends toward the inside of the base 42. A chuck mounting plate 124 is attached to the tip of each piston rod 122.

[0044] 8, two chuck devices 126 are attached to each chuck mounting plate 124 so as to correspond to each connecting rod 30. Each chuck device 126 has a fixed chuck piece 128 fixed to the chuck mounting plate 124 and a movable chuck piece 132 driven by an electromagnetic actuator 130, and detachably holds the rod-shaped portion 30A of the corresponding connecting rod 30 by the fixed chuck piece 128 and the movable chuck piece 132.

[0045] Each lifting table 112 is moved up and down by a feed screw 116 between a retracted position in which the chuck device 126 and the fluid pressure cylinder device 120 are located below the upper surface of the base 42, as shown in FIG. 5, and an operating position in which the chuck device 126 and the fluid pressure cylinder device 120 are located above the upper surface of the base 42, as shown in FIGS. 6 and 7.

[0046] When the lifting platform 112 is in the retracted position, the chuck device 126 and the fluid pressure cylinder device 120 do not interfere with the rotor core holding jig 10 which is carried in and out in the left-right direction relative to the base 42. This allows the rotor core holding jig 10 to be carried in and out of the setting device 40 without interfering with the chuck device 126 etc.

[0047] Each chuck device 126 is moved left and right by the fluid pressure cylinder device 120 between a most retracted position where it does not interfere with the base 42 when the lifting platform 112 is in the retracted position described above, as shown in FIG. 5, a separated position where the corresponding connecting rod 30 is separated from the engagement groove 32 when the lifting platform 112 is in the operating position described above, as shown in FIG. 6, and an engagement position where the corresponding connecting rod 30 engages with the engagement groove 32 in addition to the engagement groove 34 when the lifting platform 112 is in the operating position described above, as shown in FIG. 7.

[0048] When setting the rotor core 2 in the rotor core holding jig 10 using the setting device 40, first, with each lifting platform 112 in the retracted position, the rotor core 2 is carried onto the base 42 by a robot arm (not shown) or the like, as shown in Fig. 5. Prior to this carrying in, magnet pieces 5 are inserted into each magnet insertion hole 4 of the rotor core 2.

[0049] Next, the electric motors 114 are driven to raise the lifting platform 112 to the operating position, and the pressure device 48 is driven to press the pressure plate 52 against the upper plate 14. This causes the upper plate 14 to descend, and each of the compression coil springs 28 is compressed and deformed.

[0050] In this state, the fluid pressure cylinder device 120 drives each chuck device 126 to move forward to the separated position as shown in FIG. 6, and the electromagnetic actuator 130 drives each chuck device 126 to grip the connecting rod 30 suspended and supported by the upper plate 14.

[0051] After the gripping is completed, each chuck device 126 advances to the engagement position by driving the fluid pressure cylinder device 120. As a result, each connecting rod 30 engages with the engagement groove 32 of the lower plate 12 in addition to the engagement groove 34 of the upper plate 14.

[0052] Thereafter, the pressure plate 52 is released from pressing the upper plate 14, and the lower plate 12 and the upper plate 14 are connected to each other by the connecting rod 30 with the spring force of each compression coil spring 28 reaching a predetermined value.

[0053] This automates the setting of the connecting rods 30, and the rotor core 2, together with the rotor core holding jig 10, can be handled as a subassembly in which the openings 4B of each magnet insertion hole 4 are blocked by the corresponding blocking members 26 with the pressing force of the compression coil springs 28, as shown in Figure 3.

[0054] Thereafter, each chuck device 126 returns to its most retracted position, and each lift table 112 descends to its retracted position. In this state, the rotor core holding jig 10 is removed from the setting device 40.

[0055] Another embodiment of the setting device 40 will be described with reference to Fig. 9. In Fig. 9, parts corresponding to those in Figs. 5 to 7 are given the same reference numerals as those in Figs. 5 to 7, and descriptions thereof will be omitted.

[0056] In this embodiment, a rotating table 138 is rotatably provided by a pivot 136 on each of brackets 134 attached to both the left and right sides of the base 42. A cylinder mounting plate 118 is attached to each rotating table 138.

[0057] As a result, the chuck devices 126 and the like are moved to their retracted positions by the rotation of the rotary table 138 .

[0058] Other than that, the embodiment is substantially the same as the embodiment shown in Figures 5 to 8. As a result, the same effects as those of the embodiment shown in Figures 5 to 8 can be obtained in this embodiment as well.

[0059] Next, the resin molding device 60 will be described with reference to FIGS.

[0060] The resin molding device 60 has a plurality of post members 62 extending in the vertical direction, a fixed platen 64 fixed to the upper ends of the post members 62, and a movable platen 66 that can move up and down while being guided by the post members 62. The movable platen 66 is driven in the vertical direction by a drive device (not shown) that uses fluid pressure or the like, and can move toward and away from the fixed platen 64.

[0061] A lower base member 70 is attached onto the movable platen 66. The lower base member 70 is configured by an assembly in which a lower member 72, an intermediate member 74, and an upper member 76 are stacked one on top of the other. As shown in Fig. 10, with the movable platen 66 in a lowered state, the subassembly of the rotor core 2 is placed on the upper member 76 together with the rotor core holding jig 10.

[0062] The upper member 76 is formed with a plurality of resin pots 80 corresponding to each magnet insertion hole 4 of the rotor core 2. Each resin pot 80 opens on the upper surface of the upper member 76 and communicates with the corresponding cull opening 22. The intermediate member 74 is formed with a plunger chamber 82 and a push rod chamber 84 communicating with each resin pot 80. As a resin introduction device for introducing molten resin from the resin pot 80 to the magnet insertion hole 4 via the gate 20, a plunger 86 is provided in the plunger chamber 82 and a push rod 88 is provided in each push rod chamber 84 so as to be vertically movable. The resin pots 80, the plunger chamber 82, and the cull opening 22 are bores of the same inner diameter, and the plunger 86 can enter from the plunger chamber 82 to the cull opening 22.

[0063] A block-shaped solid resin 6 is placed on the plunger 86 of each resin pot 80 .

[0064] Each push rod 88 abuts against a corresponding plunger 86 at its upper end, moving the plunger 86 upward. Each push rod 88 has a pressure-receiving flange 90 at its lower end, and hydraulic pressure is applied to each pressure-receiving flange 90 by hydraulic oil in a manifold oil passage 92 formed in the intermediate member 74. A cylinder chamber 94 is formed in the lower member 72. A piston 96 is provided in the cylinder chamber 94 so as to be able to move up and down. The piston 96 defines an upper oil chamber 98 on the upper side that communicates with the manifold oil passage 92, and defines a lower oil chamber 100 on the lower side. The upper oil chamber 98 and the lower oil chamber 100 are connected to a hydraulic source (not shown) by oil passages 102, 104, etc. formed in the lower member 72.

[0065] A heater 106 for heating the lower base member 70 is embedded in the lower base member 70 .

[0066] An upper opposing member 108 is attached to the lower part of the fixed platen 64. The upper opposing member 108 faces the lower base member 70 via the rotor core holding jig 10 on the lower base member 70, and since the movable platen 66 can approach and move away from the fixed platen 64, the upper opposing member 108 can move toward and away from the lower base member 70 relatively.

[0067] As shown in FIG. 11, each plate pressing rod 36 comes into contact with the underside of the upper opposing member 108 as the movable platen 66 moves upward, and the pressure force transmitted from the upper opposing member 108 to the lower plate 12 presses the lower plate 12 against the lower base member 70.

[0068] As a result, the force pressing the lower plate 12 against the lower base member 70 in the rotor core holding jig 10 is determined by the rising force (mold clamping force) of the movable platen 66, separately from the force pressing the blocking member 26 against the rotor core 2 by the spring force of the compression coil spring 28, and the connection between the cull opening 22 and the resin pot 80 is made without any gaps under the force pressing the lower plate 12 against the lower base member 70.

[0069] The solid resin 6 in each resin pot 80 is melted by heating with a heater 106 or the like. Under this condition, as shown in Fig. 12, hydraulic pressure is supplied from a hydraulic source (not shown) to the lower oil chamber 100, and the piston 96 moves upward, whereby pressure is uniformly transmitted to each pressure-receiving flange 90 and each push rod 88 using the hydraulic oil in the manifold oil passage 92 as the pressure medium. This causes each plunger 86 to move upward, and the molten resin 6 in each resin pot 80 is pressure-fed and filled into each magnet insertion hole 4 through the corresponding cull opening 22 and gate 20.

[0070] The force pressing the lower plate 12 against the lower base member 70 can be set independently to an appropriate value, neither excessive nor insufficient, by the upward force of the movable platen 66, so that the connection between the cull opening 22 and the resin pot 80 is performed with an appropriate pressing force pressing the lower plate 12 against the lower base member 70. This prevents the molten resin 6 from leaking out from the boundary between the lower plate 12 and the lower base member 70 during the process of pumping the molten resin 6 from the resin pot 80 to the magnet insertion hole 4, and prevents burrs from being generated at the boundary.

[0071] Since the blocking member 26 is pressed against the rotor core 2 by the spring force of the compression coil spring 28 in addition to the upward force of the movable platen 66, the force pressing the blocking member 26 against the rotor core 2 can be set independently to an appropriate value that is neither excessive nor insufficient, separate from the force pressing the lower plate 12 against the lower base member 70. As a result, the blocking of the opening 4B of the magnet insertion hole 4 and the connection between the opening 4A of the magnet insertion hole 4 and the gate 20 are performed with an appropriate pressing force by pressing the blocking member 26 against the rotor core 2, without causing deformation such as warping of the rotor core 2. As a result, in the process of pumping the molten resin 6 from the resin pot 80 to the magnet insertion hole 4, the molten resin 6 is prevented from leaking to the outside from the opening 4B of the magnet insertion hole 4 or from leaking to the outside from the boundary between the opening 4A of the magnet insertion hole 4 and the gate 20, and burrs are prevented from being generated at the boundary or around the opening 4B.

[0072] Although the present invention has been described above based on specific embodiments, these embodiments are merely examples and the present invention is not limited to these embodiments.

[0073] For example, a mechanism for moving the chuck device 126 to the retracted position is not essential. The engagement grooves 32 and 34 may be provided on the front and rear outer edges of the lower plate 12 and the upper plate 14 in addition to those that open on the left and right outer edges of the lower plate 12 and the upper plate 14. In this case, the chuck devices 126 and the like are provided corresponding to each of the two front and rear sides in addition to the two left and right sides of the lower plate 12 and the upper plate 14, and the chuck device 126 corresponding to at least one side of the lower plate 12 and the upper plate 14 is structured so as to be movable to the retracted position for loading and unloading the rotor core holding jig 10 into and from the setting device 40. The resin molding device 60 may be arranged upside down.

[0074] The components of the manufacturing method of the embedded magnet core according to the present invention shown in the above embodiment are not necessarily all essential, and can be selected as appropriate within the scope of the present invention. [Explanation of symbols]

[0075] 1: Embedded magnet core 2: Rotor core 2A: Bottom end surface 2B: Top surface (one end surface) 3: Shaft hole 4: Magnet insertion hole 4A: Opening (one opening) 4B: Opening (other opening) 5: Magnet piece 10: Rotor core holding jig 12: Lower plate (first plate) 12A:Top surface 14: Upper plate (second plate) 14A: Bolt hole 15: Overhang part 20: Gate 22: Cal opening 24: Bolt 24A: Head 26: Closing member 26A: Bottom surface 28: Compression coil spring 30: Connecting rod 30A: Rod-shaped part 30B: Flange part 30C: Flange part 32: Engagement groove 32A: Concave groove 32B: Opening 32C: Shoulder 34: Engagement groove 34A: Concave groove 34B: Opening 34C: Shoulder 36: Plate pressing rod 38:Through hole 40: Setting device 42: Foundation 44: Post material 46: Counter stand 48: Pressurizing device 50: Piston rod 52: Pressure plate 60: Resin molding device 62: Post material 64: Fixed platen 66: Movable platen 70: Lower base member 72: Lower member 74: Intermediate part 76: Upper member 80: Resin pot 82: Plunger chamber 84: Push rod chamber 86: Plunger 88: Push rod 90: Pressure flange 92: Manifold oil passage 94: Cylinder chamber 96: Piston 98: Upper oil chamber 100: Lower oil chamber 102: Oil road 104: Oil road 106: Heater 108: Upper opposing member 110: Guide rail 112: Lift platform 114: Electric motor 116: Lead screw 118: Cylinder mounting plate 120: Fluid pressure cylinder device (drive device) 122: Piston rod 124: Chuck mounting plate 126: Chuck device 128: Fixed chuck piece 130: Electromagnetic actuator 132: Movable chuck piece 134: Bracket 136: Axis 138: Rotating table

Claims

1. A setting device for a rotor core holding jig, comprising: a first plate and a second plate facing each other; and a connecting means for connecting the first plate and the second plate to each other, wherein a rotor core is disposed between the first plate and the second plate, A base on which the rotor core holding jig is placed; and a pressure device that presses the second plate of the rotor core holding jig on the base toward the first plate, the rotor core includes a magnet insertion hole having an opening on each end surface in an axial direction, the rotor core holding jig further includes a closing member connected to the second plate via a compression spring member and contacting one of the two end faces of the rotor core to close the magnet insertion hole, The connecting means is a setting device that connects the first plate and the second plate to each other so that the spring force of the compression spring member becomes a predetermined value when the closing member closes the opening.

2. A setting device as described in Claim 1, wherein the first plate includes a gate communicating with the magnet insertion hole opening in the other of the end faces of the rotor core.

Images