JP2014138512A - Manufacturing method and manufacturing apparatus of magnet body for field pole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method and manufacturing apparatus of a magnet body for field poles, suitable for reducing a cycle time of groove processing even when a field pole is constituted of magnet bodies having different thicknesses.SOLUTION: A groove processing device for forming a notch groove 33 in a width direction to a magnet body 30 includes: a positioning jig 16 for positioning parts to be divided on the same line and arranging a plurality of magnet bodies 30 having different plate thicknesses each other in parallel. The positioning jig 16 comprises: a jig base 17 including a plurality of pedestals 18 for placing and holding the magnet bodies 30, respectively; a positioning pin 19 as a positioning member for positioning each magnet body 30 from a longitudinal direction; and a width direction positioning pin 20 as a positioning member for positioning each magnet body 30 from a width direction. The plurality of pedestals 18 are formed to vary height positions according to widths of the magnet bodies 30 to be held, respectively and are formed so that a height position of the upper surface of the magnet body 30 to be held is the same in the plurality of magnet bodies 30.

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a field pole magnet body disposed in a rotor core of a rotating electrical machine.

  Conventionally, as a field pole magnet body disposed in a rotor core of a rotating electrical machine, a rectangular magnet body in plan view is divided into a plurality of magnet pieces, and the magnet pieces are bonded together in an insulated state. There are known field pole magnets. In this way, the field pole magnet body is formed of a plurality of magnet pieces, and the volume of each magnet piece is reduced to reduce eddy currents generated by fluctuations in the acting magnetic field. Thereby, the heat generation of the field pole magnet body due to the eddy current is suppressed, and irreversible thermal demagnetization is prevented (see Patent Document 1). Conventionally, there is one in which each of a plurality of field poles arranged at equal intervals in the circumferential direction of a rotor core of a rotating electrical machine is configured with a plurality of magnet bodies (see Patent Document 2).

  In Patent Document 1, a notched groove extending in the width direction of the magnet body, which is a guide for cleaving, is provided in advance in a magnet body having substantially the same size and shape as the rotor slot, and an upper mold and a lower mold having contact portions that contact the magnet body. The magnet body is divided into magnet pieces by sandwiching the magnet body with the mold. In Patent Document 2, each of the plurality of magnet bodies constituting each field pole is composed of two magnet bodies having a large thickness and one magnet having a small thickness.

Japanese Patent No. 4497198 JP 2002-84722 A

  By the way, as in the above-mentioned Patent Document 1, when a notch groove serving as a guide for cleaving is provided in a magnet body, the greater the depth of the notch groove and the sharper the tip of the notch groove, Since the flatness of the cross section is improved, groove processing by a laser beam is performed. And in patent document 1, since the magnet body of each magnetic pole is the same plate | board thickness dimension, it arranges and positions a several magnet body on a jig | tool so that the predetermined part of the groove process may be on a line, and irradiates Grooves can be formed on these magnet bodies by a single scan of the laser beam.

  However, as in Patent Document 2, in the case of providing magnet bodies with different thicknesses, align the magnet bodies with the same thickness dimension, and groove the magnet bodies by the same method as described above for each thickness dimension, Every time the thickness dimension is changed, it is necessary to reset the height dimension of the scanner head in accordance with the magnet body. For this reason, it is necessary to align the magnet body of the same thickness dimension or adjust the height dimension of the scanner head prior to grooving in what constitutes the magnetic pole by combining magnet bodies of different thicknesses, There was a problem that the cycle time of grooving was long.

  Accordingly, the present invention has been made in view of the above problems, and a field pole magnet suitable for shortening the cycle time of grooving even if the field pole is composed of magnet bodies having different thickness dimensions. It aims at providing the manufacturing method and manufacturing apparatus of a body.

  The present invention provides a field pole magnet including a groove processing device that forms a notch groove in the width direction with respect to a magnet body by scanning a laser beam to be irradiated along a scheduled division portion of a plate-like magnet body. It is a body manufacturing device. The grooving apparatus includes a positioning jig that places a plurality of divisional parts on the same line and holds a plurality of magnet bodies having different plate thicknesses in parallel with each other. The positioning jig includes a jig base including a plurality of pedestals for holding and holding magnet bodies, a positioning member for positioning each magnet body from the longitudinal direction, and a positioning member for positioning the magnet body from the width direction. Prepare. The plurality of pedestals are formed with different height positions according to the thickness dimension of the magnet body to be held, and are formed so that the height positions of the upper surfaces of the magnet bodies to be held are the same for the plurality of magnet bodies. It is characterized by that.

  Therefore, in the present invention, since the surfaces of the plurality of magnet bodies are made to be the same plane by adjusting the height of the pedestal, magnets having different plate thicknesses without changing the height position of the scanner head or processing table. The body can be grooved simultaneously. As a result, the cycle time of groove processing can be shortened.

It is sectional drawing of the rotor of the rotary electric machine which arrange | positions the magnetic body for field poles of embodiment of this invention. It is explanatory drawing which shows the structure of the magnetic body for field poles of embodiment of this invention. It is a figure which shows the manufacturing process of the magnetic body for field poles of embodiment of this invention. It is explanatory drawing which shows the laser processing apparatus which forms a division | segmentation starting point with respect to a magnet body. It is a top view which shows the positioning jig of 1st Example. It is a side view from the Y direction which shows the positioning jig of 1st Example. It is a side view from the X direction which shows the positioning jig of 1st Example. It is a top view which shows the positioning jig of 2nd Example. It is a side view from the X direction which shows the positioning jig of 2nd Example. It is a top view which shows the positioning jig of 3rd Example. It is a side view from the X direction which shows the positioning jig of 3rd Example.

  Embodiments of a field pole magnet body, a manufacturing method thereof, and a manufacturing apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view of a rotor core of a rotating electrical machine in which a field pole magnet body of the present invention is disposed. 1A is a longitudinal cross-sectional view of the rotor 50, and FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A. In the rotating electrical machine, a stator is disposed around the rotor 50, and a rotating magnetic field is generated by applying a three-phase alternating current composed of a U phase, a V phase, and a W layer to the stator, and is rotatably supported inside the stator. The rotor 50 is rotated. The rotating electrical machine can be used as a motor / generator for driving an electric automobile, for example.

  The rotor 50 includes a rotor core 51 configured by laminating a large number of thin electromagnetic steel plates 51 a, and a plurality of field pole magnet bodies 80 inserted into the rotor core 51. The rotor core 51 is formed by laminating a plurality of electromagnetic steel plates 51a that have been press-molded in advance into a predetermined shape, and integrally forming the laminated electromagnetic steel plates 51a by bonding or caulking. The rotor core 51 is formed with a magnet insertion hole 52 for accommodating the field pole magnet body 80, a shaft hole 53 for fixing the rotation shaft, and a vent hole 54 for cooling the rotor 50. A plurality of these magnet insertion holes 52 and vent holes 54 are formed point-symmetrically with respect to the center of the shaft hole 53. In addition, the magnet insertion holes 52 of the present embodiment are arranged at equal intervals in the circumferential direction of the rotor core 51, and in the shape of a letter C on the radially inner side with respect to each of the arranged magnet insertion holes 52. Two magnet insertion holes 52 are arranged. The field pole magnet body 80 has a predetermined shape that can be inserted into the magnet insertion hole 52, and one magnet body 80A having a large thickness and two magnet bodies 80B having a small thickness. It constitutes one field pole. Hereinafter, when the plate thickness dimension is not specified, it is simply referred to as a magnet body 80.

  As shown in FIG. 2, the field pole magnet body 80 is formed into a magnet body 30 having a predetermined shape that can be inserted into the magnet insertion hole 52, and then divided into a plurality of magnet pieces 31 in the axial direction of the rotor core 51. To do. The field pole magnet body 80 is constituted by reassembling the plurality of magnet pieces 31 into an original predetermined shape as an assembly of magnet pieces 31 aligned in a line by bonding the split sections with a resin 32. As the resin 32 used, for example, a resin having a heat resistance of about 200 ° C. is used, and the adjacent magnet pieces 31 are electrically insulated from each other. For this reason, the eddy current generated by the fluctuation of the acting magnetic field is reduced by staying in the individual magnet pieces 31, the heat generation of the field pole magnet body 80 due to the eddy current is suppressed, and irreversible thermal demagnetization is prevented To do. In the following description, the magnet body 30 is used for the magnet body before the cleaving division, and the magnet body 80 is bonded to the magnet pieces 31 by a resin 32 to form an assembly of magnet pieces 31 aligned in a row. As follows. Further, the magnet body 30 has a plate thickness dimension of 30A (magnet piece is 31A) for a thicker one, and as a magnet body 30B (magnet piece is 31B) for a thinner one, the two are distinguished. When the plate thickness dimension is not specified, the magnet body 30 (magnet piece 31) is simply referred to.

  As a method of dividing the magnet body 30 into a plurality of magnet pieces 31, there is a method of cracking in which a split starting point by the notch groove 33 is formed in the magnet body 30 and this is cleaved. Generally, division by cracking is advantageous in terms of cost, and in this embodiment, the magnet piece 31 is formed by cracking.

  Next, an outline of a method for manufacturing the magnet body 80 will be described. FIG. 3 is a diagram illustrating a manufacturing process of the magnet body 80. Each process is mainly performed manually by an operator or automatically by an industrial robot or the like. First, a magnetic powder composed of iron oxide, rare earth, and various elements is inserted into a rectangular mold, and pressed and pressed while applying a magnetic field to it, and the pressed material is put into a vacuum sintering furnace. Then, a predetermined temperature is applied, and sintering is performed for a predetermined time. Then, the sheet is cut into a desired size in a thin plate shape, and the surface is polished, whereby the thin plate-shaped magnet body 30 is manufactured.

  Next, the manufactured magnet body 30 is cracked and rejoined. First, in order to divide the manufactured magnet body 30 into magnet pieces 31 having a desired size, a division starting point is formed for each part to be divided (division starting point forming step). In the present embodiment, as will be described later, the division starting point is formed by forming a notch groove 33 in the width direction of the magnet body 30 by laser processing at a planned division site.

  Next, the magnet body 30 is divided into a plurality of magnet pieces 31 by the formed division starting points (cracking step). For example, in the longitudinal direction of the magnet body 30, cracking is performed by supporting the front and rear positions of the magnet body 30 with a fulcrum, and by applying a bending force with a blade from a surface opposite to the surface on which the split origin is located. A crack is generated from the portion, and it is cut and divided into magnet pieces 31 (three-point bending).

  Next, the divided magnet pieces 31 are laminated so that the cut surfaces face each other, and are joined by an insulating resin 32. After joining, the magnet body 80 is heated to cure the resin (lamination adhesion / heat curing step). Next, a predetermined magnetic force is applied to the joined magnet body 80 to magnetize the magnet body 80 (magnetization step). The magnet body 80 is manufactured by the process as described above.

  Next, a forming apparatus and a forming method of the notch groove 33 which is a division starting point for the magnet body 30 in the present embodiment will be described in detail.

  FIG. 4 shows a laser processing apparatus for forming the notch groove 33. The laser processing apparatus introduces laser light from a laser oscillator as a laser source (not shown) through the transmission fiber 11 and the collimator lens 12 and scans along a planned division portion of the magnet body 30 positioned on the jig. In addition, a scanner head 10 for irradiating is provided. The laser light that has passed through the collimating lens 12 is converted into parallel light and introduced into the scanner head 10. The laser beam to be introduced is, for example, a laser beam having a wavelength of 1000 to 1100 [nm].

  The scanner head 10 includes a pair of galvanometer mirrors, that is, a galvanometer mirror 13 that scans laser light in the X direction and a galvanometer mirror 14 that scans in the Y direction. These mirrors 13 and 14 are for control (not shown). It is driven by a motor. The laser light is scanned in the XY direction via the two galvanometer mirrors 13 and 14, passes through the f-θ lens 15, and is scanned along the planned division portion of the magnet body 30. The f-θ lens 15 condenses the beam deflected by the scanner of the galvanometer mirrors 13 and 14 onto a flat image surface of the magnet body 30 as a workpiece, and converts the equiangular motion of the scanner into a constant velocity motion for scanning. Let For this reason, the irradiated laser beam 60 is scanned in the Y direction every time the surface of the magnet body 30 is positioned at a predetermined pitch in the X direction.

  5 to 7 are a plan view, a side view from the Y direction, and a side view from the X direction, showing the positioning jig of the first example of the present embodiment. As shown in FIG. 5, one magnet body 30 </ b> A having a large thickness dimension and two magnet bodies 30 </ b> B having a small thickness dimension are located on the same line with the planned division portion where the notch groove 33 is provided. The positioning jig 16 holds them in parallel with each other. The positioning jig 16 includes a jig base 17 including a pedestal 18 for placing and holding the magnet body 30, a longitudinal positioning pin 19 for positioning the magnet body 30 from the longitudinal direction, and a width for positioning the magnet body 30 from the width direction. A direction positioning pin 20. Furthermore, the positioning jig 16 includes a clamp 21 that biases and clamps the magnet body 30 toward the longitudinal positioning pin 19.

  The jig base 17 is positioned on the processing table by fitting positioning holes to positioning pins 22 (four locations) provided on a processing table (not shown) of the laser processing apparatus, and fastening bolts are placed in the fixing holes 23 (two locations). It is fixed to the processing table by tightening. The pedestal 18 is provided by being raised from the jig base 17 for each magnet body 30, and supports the magnet body 30 on the upper surface thereof. The height of each pedestal 18 is different between the pedestal 18 of the magnet body 30A and the pedestal 18 of the magnet body 30B so that the height dimension of the upper surface of the held magnet body 30 is the same. The width of each pedestal 18 is smaller than the width of the magnet body 30 to be held. The surface portion excluding the pedestal 18 portion of the jig base 17 is set low with a step from the pedestal 18. The surface of the jig base 17 is scanned with at least the laser beam 60 and the jig surface is coated with a crystalline polymer 24 by, for example, attaching a Teflon (registered trademark) sheet or a Teflon (registered trademark) film. Protected.

  A longitudinal direction positioning pin 19 for positioning the magnet body 30 from the longitudinal direction and a width direction positioning pin 20 for positioning the magnet body 30 from the width direction are arranged on the surface portion of the jig base 17 excluding the base 18 portion. Prepare.

  The longitudinal positioning pin 19 is composed of two pins that come into contact with the longitudinal end face of each magnet body 30, and is arranged upright on the jig base 17 at a slight distance from the longitudinal end face of each pedestal 18. ing. For this reason, each longitudinal direction positioning pin 19 positions each magnet body 30 in a longitudinal direction by contacting the longitudinal direction end face of each magnet body 30 that protrudes from the longitudinal end face of the base 18. The upper end of each longitudinal positioning pin 19 is set lower than the upper surface of each magnet body 30, and each longitudinal positioning pin 19 comes into contact with the lower region of the longitudinal end face of each magnet body 30, thereby each magnet body. 30 is positioned longitudinally.

  The width direction positioning pin 20 is constituted by a single pin that comes into contact with the width direction end face of each magnet body 30, and is arranged upright on the jig base 17 that is slightly spaced from the width direction end face of each base 18. ing. For this reason, each width direction positioning pin 20 positions each magnet body 30 in the width direction by contacting the width direction end surface of each magnet body 30 that protrudes from the width direction end surface of the base 18. The upper end of each width direction positioning pin 20 is set lower than the upper surface of each magnet body 30, and each width direction positioning pin 20 comes into contact with the lower region of the end surface in the width direction of each magnet body 30. 30 is positioned in the width direction.

  The longitudinal direction positioning pin 19 and the width direction positioning pin 20 have a stepped structure in which the base to be attached to the jig base 17 has a large diameter portion and the tip has a small diameter portion, and each small diameter portion is a longitudinal end of the magnet body 30. The magnet body 30 is positioned by being engaged with the portion and the end portion in the width direction.

  The clamp 21 is disposed on the pedestal 18 adjacent to the pedestal 18 region in contact with each magnet body 30 of each pedestal 18. The clamp 21 includes a plate clamp member 21 </ b> A that can move in the longitudinal direction of the magnet body 30, and a tightening mechanism 21 </ b> B that urges the clamp member 21 </ b> A to contact the longitudinal end surface of the magnet body 30. The tightening mechanism 21B includes, for example, a bolt including a tapered portion at the head and a hole provided in the clamp member 21A and including a tapered wall that engages with the tapered portion of the bolt. Then, by tightening the bolt, the tapered portion is brought into contact with the tapered wall of the clamp member 21 </ b> A, so that the clamp member 21 </ b> A is biased toward the magnet body 30. The surface of the clamp member 21A is made lower than the surface of the magnet body 30 to be fixed. For this purpose, the clamp member 21A is provided with a thin plate material, or the height of the pedestal 18 part forming the mounting surface of the clamp member 21A is lowered.

  In the manufacturing apparatus for the field pole magnet body 30 having the above configuration, when positioning the magnet body 30 on the positioning jig 16, first, in a state where the clamp 21 is loosened, each of the corresponding thicknesses on the base 18. The magnet body 30 is placed. Next, the end surfaces in the width direction of the respective magnet bodies 30 are brought into contact with the width direction positioning pins 20, and the magnet bodies 30 are moved in the longitudinal direction while maintaining the contact state. Thus, the longitudinal end face of the magnet body 30 is brought into contact with the longitudinal positioning pin 19 to position the magnet body 30 on the positioning jig 16 in the width direction and the longitudinal direction. Next, the clamping mechanism 21 </ b> B of the clamp 21 is operated to bring the clamping member 21 </ b> A into contact with the longitudinal end surface of the magnet body 30 and bias it in the longitudinal direction, thereby fixing the magnet body 30 on the pedestal 18.

  The magnet body 30 fixed to the positioning jig 16 is arranged in parallel to each other with the scheduled division portions where the notch grooves 33 are provided positioned on the same line. Moreover, since the height dimension of each pedestal 18 is adjusted according to the thickness dimension of the magnet body 30 held, the upper surface of each magnet body 30 is the same plane. Further, both end portions in the width direction of the magnet body 30 are overhanging from the end portion in the width direction of the pedestal 18 and protrude from the surface of the jig base 17. Further, since the jig base 17 is positioned on the processing table of the laser processing apparatus by the positioning pins 22, each magnet body 30 is also positioned with respect to the laser processing apparatus.

  In this state, the two galvanometer mirrors 13 and 14 of the scanner head 10 are controlled so that the scanning point of the laser beam 60 is at the irradiation position in the longitudinal direction (X direction position) and the width direction (Y direction). , Adjust to position. Next, scanning is performed so that the scanning point of the laser beam 60 moves in the width direction (Y direction), scanning is performed so that the scanning point sequentially passes over each magnet body 30, and the scanning point passes over the magnet body 30. The laser beam 60 is irradiated in synchronization with the period. On the surface of each magnet body 30 arranged in parallel, the material of the magnet body 30 is melted and bumped by the laser beam 60 and scattered as spatter, and the notched grooves 33 are processed for the respective scheduled portions. To do.

  Since the surfaces of the magnet bodies 30A and 30B are made to be the same plane by adjusting the height of the pedestal 18, the magnet bodies 30 having different plate thicknesses can be formed without changing the height position of the scanner head 10 or the processing table. Grooving can be performed at the same time. For this reason, the cycle time of groove processing can be shortened. Further, since the pedestal 18 of the positioning jig 16 that supports the magnet body 30 is formed with a width dimension smaller than the width of the magnet body 30, it is not exposed behind the shadow of the magnet body 30 that is the workpiece, Damage to the laser beam 60 can be prevented.

  Further, since the surface of the jig base 17 around the pedestal 18 is positioned at a distance from the magnet body 30, the surface of the jig base 17 is irradiated with the laser beam 60 adjusted in focus on the surface of the magnet body 30. Even so, the laser beam 60 is diffused on the surface of the jig base 17. For this reason, irradiation is started before the scanning point moves onto the magnet body 30 with respect to the magnet body 30 which is a workpiece, and irradiation is stopped after the scanning point passes over the magnet body 30. In other words, damage to the surface of the jig base 17 can be reduced even if laser irradiation is performed such as running or running through. In addition, since the surface of the jig base 17 on both sides in the width direction of each magnet body 30 is protected by the crystalline polymer 24 by applying a Teflon (registered trademark) sheet or a Teflon (registered trademark) film, The laser light 60 of 1000 to 1100 [nm] is diffused and can be prevented from being further damaged.

  When the laser beam 60 is irradiated onto the magnet body 30, the material of the magnet body 30 is melted and bumped along with the groove processing on the magnet body 30, and the spatter is scattered. The scattered spatter adheres to the surface of the magnet body 30 and the surface of the positioning jig 16. However, since the upper ends of the width direction positioning pin 20, the longitudinal direction positioning pin 19 and the clamp 21 are provided lower than the surface of the magnet body 30 as a workpiece, adhesion of spatter mainly scattered upward can be reduced. . For this reason, the frequency of cleaning of the positioning jig 16 and part replacement can be reduced.

  Moreover, since the width direction positioning pin 20 and the longitudinal direction positioning pin 19 are erected from the surface of the jig base 17 positioned lower than the magnet body 30 that is the workpiece, they are mainly scattered upward. Spatter adhesion can be further reduced. In addition, the width direction positioning pin 20 and the longitudinal direction positioning pin 19 have a stepped structure, and in particular, a portion that abuts on the magnet body 30 and exhibits a positioning function is a small diameter portion, so that spatter adheres to the portion. Can be suppressed.

  8 and 9 are a plan view and a side view from the X direction showing a positioning jig according to a second example of the present embodiment. In the present embodiment, a configuration in which two magnet bodies are positioned in the width direction by one width direction positioning pin is added to the first embodiment. The same apparatus as that of the first embodiment is denoted by the same reference numeral, and the description thereof is omitted or simplified.

  In this embodiment, as shown in FIGS. 8 and 9, two magnet bodies 30 </ b> B are positioned in the width direction by abutting on both sides of one width direction positioning pin 20. Along with this, the pedestal 18 that supports the two magnet bodies 30B and the installation positions of the longitudinal positioning pins 19 are also arranged close to each other. In addition, the remaining magnet body 30A, the pedestal 18 that supports the magnet body 30A, and the installation positions of the width direction positioning pins 20 and the longitudinal direction positioning pins 19 that are associated therewith are also moved closer to the magnet body 30B side in the width direction. I try to arrange it. Other configurations are the same as those of the first embodiment.

  As described above, in this embodiment, the two magnet bodies 30 </ b> B are positioned in the width direction by being brought into contact with both sides of the single width direction positioning pin 20. For this reason, the arrangement space in the width direction of the two magnet bodies 30B can be reduced, and the positions in the width direction of the remaining magnet bodies 30A can be arranged close to the two magnet bodies 30B. As a result, the space in the width direction of the three magnet bodies 30 can be made compact.

  Therefore, the f-θ lens 15 having a short focal length can be used to reduce the condensing diameter of the laser light 60, but a plurality of magnet bodies can be formed by using the optical scanner head 10 with a narrow processing area. 30 can be grooved. Moreover, since the space | interval of the width direction of the magnet bodies 30 can be made small, the quantity of the magnet bodies 30 which can be processed simultaneously can be increased.

  10 and 11 are a plan view and a side view from the X direction showing a positioning jig according to a third example of the present embodiment. In the present embodiment, a configuration in which the longitudinal positioning of each magnet body is formed integrally with the jig base is added to the first embodiment. The same devices as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  In this embodiment, as shown in FIGS. 10 and 11, the longitudinal positioning of each magnet body 30 is performed by raising the end region in the X direction of the jig base 17 to form the longitudinal positioning portion 19 </ b> A. is there. The longitudinal positioning portion 19A may be formed integrally with the jig base 17 as described above, but is used to fix a member separate from the jig base 17 to the jig base 17. May be. Other configurations are the same as those in the first and second embodiments.

  In the present embodiment, the longitudinal positioning of each magnet body 30 is formed by an integral object common to each magnet body 30. That is, since the common longitudinal direction positioning portion 19A is provided, the positional accuracy of each magnet body 30 can be improved, and the positional accuracy of the grooved cutout groove 33 can also be improved.

  The clamp 21 and the tightening mechanism 21B have been described as pressing the clamp member 21A against the longitudinal end of the magnet body 30 by tightening a bolt. However, as the tightening mechanism 21 </ b> B of the clamp 21, the clamp member 21 </ b> A may be pressed against the longitudinal end portion of the magnet body 30 by an electromagnet. If it does in this way, an operation state and a non-operation state can be switched by ON-OFF, and detachment | desorption of the magnet body 30 which is a workpiece can be performed in a short time.

  In the present embodiment, the following effects can be achieved.

  (A) A field provided with a groove processing device that forms a notch groove 33 in the width direction with respect to the magnet body 30 by scanning the laser beam 60 to be irradiated along the scheduled division portion of the plate-like magnet body 30. This is a manufacturing apparatus for the magnetic body 80 for magnetic poles. This grooving apparatus is provided with a positioning jig 16 that places a plurality of magnet bodies 30 having different plate thicknesses in parallel with each other, with the scheduled division portions positioned on the same line. The positioning jig 16 includes a jig base 17 including a plurality of pedestals 18 that respectively hold and hold the magnet bodies 30. The positioning jig 16 includes a longitudinal direction positioning pin 19 as a positioning member for positioning each magnet body 30 from the longitudinal direction, and a width direction positioning pin 20 as a positioning member for positioning the magnet body 30 from the width direction. Prepare. The plurality of pedestals 18 are formed with different height positions according to the thickness dimension of the magnet body 30 to be held, and the height position of the upper surface of the magnet body 30 to be held is the same in the plurality of magnet bodies 30. It was formed to become. That is, since the surfaces of the magnet bodies 30A and 30B are made to be the same plane by adjusting the height of the pedestal 18, magnet bodies having different plate thicknesses without changing the height position of the scanner head 10 or the processing table. 30 can be simultaneously grooved. For this reason, the cycle time of groove processing can be shortened.

  (A) The pedestal 18 is formed to have a width-direction dimension smaller than the width-direction dimension of the magnet body 30 to be held, and holds both ends of the magnet body 30 in the width direction protruding from the width-direction ends of the pedestal 18. For this reason, the pedestal 18 is hidden behind the shadow of the magnet body 30 that is the workpiece and is not exposed and can be prevented from being damaged by the laser beam 60.

  (C) The surface of the jig base 17 excluding the pedestal 18 is set to be lower than the pedestal 18 with a step. That is, even if the laser beam 60 focused on the surface of the magnet body 30 is irradiated on the surface of the jig base 17, the laser beam 60 is diffused on the surface of the jig base 17. For this reason, irradiation is started before the scanning point moves onto the magnet body 30 with respect to the magnet body 30 which is a workpiece, and irradiation is stopped after the scanning point passes over the magnet body 30. In other words, damage to the surface of the jig base 17 can be reduced even if laser irradiation is performed such as running or running through.

  (D) The width direction positioning pin 20 as the width direction positioning member and the length direction positioning pin 19 as the length direction positioning member are erected from the surface set lower than the base 18 of the jig base 17. That is, the width direction positioning pins 20 and the longitudinal direction positioning pins 19 are erected mainly from the surface of the jig base 17 positioned lower than the magnet body 30 that is the workpiece, and thus are mainly scattered upward. Spatter adhesion can be further reduced.

  (E) At least a region scanned by irradiating the laser beam 60 on the surface of the jig base 17 is protected with a crystalline polymer 24 made of a Teflon (registered trademark) sheet or a Teflon (registered trademark) film. For this reason, the laser beam 60 with a wavelength of 1000 to 1100 [nm] is diffused and can be prevented from being further damaged.

  (F) A width direction positioning pin 20 as a width direction positioning member, a length direction positioning pin 19 as a length direction positioning member, and a clamp member 21A for urging and clamping the magnet body 30 toward the length direction positioning member are: The upper end is set lower than the height of the upper surface of each magnet body 30. In other words, the spatter that is scattered due to melting and bumping of the material of the magnet body 30 accompanying the groove processing on the magnet body 30 is mainly scattered upward. For this reason, the spatter adheres to the width direction positioning pin 20 as the width direction positioning member, the longitudinal direction positioning pin 19 as the longitudinal direction positioning member, and the clamp member 21A provided lower than the surface of the magnet body 30 as the workpiece. Can be reduced. For this reason, the frequency of cleaning of the positioning jig 16 and part replacement can be reduced.

  (G) The width direction positioning pin 20 as the width direction positioning member and the length direction positioning pin 19 as the length direction positioning member are stepped with the attachment base to the jig base 17 having a large diameter portion and the tip having a small diameter portion. It has a structure. The small diameter portion is engaged with the longitudinal end portion and the width direction end portion of the magnet body 30 to position the magnet body 30. That is, since the portion that contacts the magnet body 30 and exhibits the positioning function is a small diameter portion, it is possible to suppress the adhesion of spatter to the portion.

  (H) In the second embodiment, at least one of the width direction positioning pins 20 as the width direction positioning member is brought into contact with both sides thereof to position the two magnet bodies 30B in the width direction. For this reason, the arrangement space in the width direction of the two magnet bodies 30B can be reduced, and the positions in the width direction of the remaining magnet bodies 30A can be arranged close to the two magnet bodies 30B. As a result, the space in the width direction of the three magnet bodies 30 can be made compact. Accordingly, it is possible to groove the plurality of magnet bodies 30 using the scanner head 10 of an optical system having a narrow processing area. Moreover, since the space | interval of the width direction of the magnet bodies 30 can be made small, the quantity of the magnet bodies 30 which can be processed simultaneously can be increased.

  (K) In the third embodiment, the longitudinal positioning member is formed by the integral longitudinal positioning portion 19 </ b> A common to the magnet bodies 30. That is, since the common longitudinal direction positioning portion 19A is provided, the positional accuracy of each magnet body 30 can be improved, and the positional accuracy of the grooved cutout groove 33 can also be improved.

  (G) A field provided with a groove processing step of forming a notch groove 33 in the width direction with respect to the magnet body 30 by scanning the laser beam 60 to be irradiated along the scheduled division portion of the plate-like magnet body 30. This is a manufacturing method of the magnetic body 30 for magnetic poles. Then, in the grooving step, the parts to be divided are positioned on the same line, the magnet bodies 30 are held parallel to each other and held at the same height position on the upper surface of the magnet body 30 to be held. And the notch groove 33 is formed in the width direction with respect to the several magnet body 30 by scanning the laser beam 60 to irradiate along a division | segmentation planned site | part. That is, the surfaces of the magnet bodies 30 </ b> A and 30 </ b> B are made flush with each other by adjusting the height of the pedestal 18. For this reason, without changing the height position of the scanner head 10 or the processing table, the magnet bodies 30 having different plate thicknesses can be simultaneously grooved, and the groove machining cycle time can be shortened.

DESCRIPTION OF SYMBOLS 10 Scanner head 16 Positioning jig 17 Jig base 18 Base 19 Longitudinal positioning pin 19A as a positioning member 19A Longitudinal positioning part 20 as a positioning member 20 Widthwise positioning pin as a positioning member 21A Clamp member 24 Crystalline polymer 30, 30A , 30B Magnet body 31 Magnet piece 32 Resin 33 Notch groove 60 Laser beam 80 Field pole magnet body

Claims (10)

Field pole magnet body manufacturing apparatus provided with a groove processing device that forms a notch groove in the width direction of a magnet body by scanning a laser beam to be irradiated along a scheduled division portion of a plate-like magnet body Because
The grooving apparatus includes a positioning jig that positions the division planned portions on the same line and holds a plurality of magnet bodies having different plate thicknesses in parallel with each other,
The positioning jig includes a jig base having a plurality of pedestals for holding and holding magnet bodies, a positioning member for positioning each magnet body from the longitudinal direction, and a positioning member for positioning the magnet body from the width direction. Prepared,
The plurality of pedestals are formed with different height positions according to the thickness dimension of the magnet body to be held, and formed such that the height position of the upper surface of the magnet body to be held is the same for the plurality of magnet bodies. An apparatus for manufacturing a field pole magnet body.   The pedestal is formed to have a width direction dimension smaller than a width direction dimension of the magnet body to be held, and holds both ends of the magnet body in the width direction projecting from the width direction end parts of the pedestal. The field pole magnet body manufacturing apparatus according to claim 1.   3. The field pole magnet body manufacturing apparatus according to claim 1, wherein a surface of the jig base excluding a pedestal portion is set to be low with a level difference from the pedestal. 4.   The said width direction positioning member and a longitudinal direction positioning member are standingly arranged from the surface set lower than the base of the said jig | tool base, The Claim 1 characterized by the above-mentioned. Field pole magnet manufacturing apparatus.   5. The region of the jig base surface that is scanned by irradiating with laser light is protected with a crystalline polymer by a Teflon sheet or a Teflon film. For manufacturing a field pole magnet body according to claim 1.   The upper end of the width direction positioning member, the longitudinal direction positioning member, and the clamp member that urges and clamps the magnet body toward the longitudinal positioning member is set lower than the height of the upper surface of each magnet body. The field pole magnet body manufacturing apparatus according to any one of claims 1 to 5, wherein the field pole magnet body is a field pole magnet body.   The width direction positioning member and the longitudinal direction positioning member have a stepped structure in which the base to be attached to the jig base has a large diameter portion and the tip has a small diameter portion, and the small diameter portion is the longitudinal end portion and the width of the magnet body, respectively. The field pole magnet body manufacturing apparatus according to any one of claims 1 to 6, wherein the magnet body is positioned by being engaged with a direction end portion.   The at least one of the said width direction positioning member is contact | abutted on the both sides, and performs the width direction positioning of two magnet bodies, The one in any one of Claims 1-7 characterized by the above-mentioned. The field pole magnet body manufacturing apparatus described.   The field pole magnet body manufacturing apparatus according to any one of claims 1 to 6, wherein the longitudinal direction positioning member is formed by an integral member common to the magnet bodies. . Field pole magnet body manufacturing method comprising a groove machining step of forming a notch groove in the width direction of a magnet body by scanning a laser beam to be irradiated along a scheduled division portion of a plate-like magnet body Because
The grooving step is to keep the same position of the upper surface of the magnet body to be held while arranging the parts to be divided on the same line and holding them side by side in parallel.
A method of manufacturing a field pole magnet body, wherein notched grooves are formed in the width direction for a plurality of magnet bodies by scanning laser light to be irradiated along the planned division portions. .

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