JP2006180679A - Heating device and heating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device and a heating method by which a curing time is shortened to cure a thermosetting type adhesive agent adhered to a work by heat transfer through the work, and an uneven temperature caused in the work is suppressed. <P>SOLUTION: The heating device 14 includes two units 15 for heating, and at each of the units 15 for heating, four cartridge heaters 19 and seven thermocouples 20 are provided, respectively. Temperatures of each of the units 15 (unit main bodies 18) for heating are risen to set temperatures by each cartridge heater 19, which are higher than a curing temperature of the adhesive agent J. When each of the units 15 for heating is arranged at a heating position based on drive of each cylinder 16, a contacting surface 18a of each unit 15 for heating is put into face contact with the outside face 10a of a rotor core 10, then the adhesive agent J is thermally cured by heat transfer through the rotor core 10, and a permanent magnet 13 is bonded and fixed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heating device and a heating method, and more specifically, a heating device and a heating method for heating a work to cure a thermosetting adhesive attached to the work by heat transfer through the work. About.

  Generally, a rotor core (workpiece) in which a permanent magnet is embedded is used for a motor that requires high output. The rotor core is formed by laminating a plurality of rotor layer plates, and magnet holes extending along the lamination direction of the rotor layer plates are formed at a plurality of locations. That is, each rotor layer plate is formed with a plurality of slits at predetermined positions, and when the rotor core is laminated on each rotor layer plate, each of the slits on each rotor layer plate is the axis of the rotor core. The magnet holes are formed in a row in the direction. A permanent magnet is adhered and fixed to each magnet hole through a thermosetting adhesive (thermosetting resin) that cures at a predetermined curing temperature (for example, approximately 120 ° C.). Conventionally, when curing such a thermosetting adhesive, a method of curing the adhesive by heating the rotor core (workpiece) and transferring heat through the rotor core is known. For example, a heating device described in Patent Document 1 has been proposed as a heating device used in the above-described method.

The heating device described in Patent Document 1 includes a heating unit (described as “holding body” in Patent Document 1) for curing the adhesive, and the heating unit includes a rotor core. An accommodation hole having a cross-sectional shape corresponding to the outer peripheral shape of the laminated layer plate for the rotor is formed. The heating unit is equipped with a heater (heat generating means) that generates heat based on external power supply so as to surround the accommodation hole, so that the temperature of the heating unit itself increases as the heater generates heat. It has become. Then, in a state where a plurality of rotor layer plates are stacked and accommodated in the accommodation holes with a thermosetting adhesive interposed between the layer plates, the heating unit rises from the heated core through the rotor core (rotor layer plate). Then, heat is transmitted to the adhesive, and when the temperature of the heat transfer exceeds the curing temperature of the adhesive, the adhesive is cured and the rotor layer plates are bonded and fixed together.
JP 2001-321850 A (paragraph number [0041], FIGS. 1 and 6)

  By the way, since the outer diameter of each rotor layer plate laminated in the accommodation hole of the heating unit to form the rotor core has a variation within an allowable range of tolerance, the inner diameter of the accommodation hole is It is formed to have a size commensurate with the upper limit of the tolerance range. Therefore, when each rotor layer plate is accommodated in the accommodation hole in a laminated state so as to form the rotor core in a stacked manner, the inner surface of the accommodation hole and the rotor core (specifically, each rotor layer plate) A gap may be formed between the outer side surfaces due to variations in the outer diameter of each rotor layer plate. In such a case, the heating unit (heater) heats the rotor core (each rotor layer plate) in the accommodation hole through the air in the gap. Therefore, heat from the heater cannot be efficiently transferred to the rotor core (each rotor layer plate), and there is a problem that it takes time to cure the adhesive. In addition, when the gap between the inner side surface of the accommodation hole and the outer side surface of the rotor core (layer plate for each rotor) is not uniform, the heating unit (heater) is separated by a narrow part and a wide part of the gap. The efficiency of heat transfer to the rotor core is different, and temperature unevenness may occur in the rotor core. When the temperature unevenness occurs in the rotor core as described above, there is a problem that the adhesive is hardened at a portion where heat is not sufficiently transferred.

  The present invention has been made in view of such circumstances, and the purpose thereof is to shorten the curing time for curing the thermosetting adhesive attached to the workpiece by heat transfer through the workpiece, It is providing the heating apparatus and heating method which can suppress generation | occurrence | production of the temperature nonuniformity in the inside.

  In order to achieve the above-mentioned target, the invention according to claim 1 is a heating apparatus that cures a thermosetting adhesive attached to the workpiece by heat transfer through the workpiece by heating the workpiece. A heating unit having a contact surface that can come into surface contact with the surface of the workpiece, the heating unit being provided with heat generating means for generating heat based on external power feeding, and the heating unit being in contact with the contact surface The gist is that a moving means is provided for moving between a heating position where the surface abuts against the surface of the workpiece and a non-heating position where the abutting surface separates from the surface of the workpiece.

  According to a second aspect of the present invention, in the heating apparatus according to the first aspect, when the heating unit is thermally expanded based on the heating by the heating means, the contact surface is a surface shape of the surface of the workpiece. The gist is that it is formed to have a surface shape corresponding to the above.

  According to a third aspect of the present invention, in the heating apparatus according to the first or second aspect, when the heating unit is disposed at the heating position, the heat generating means is used for the adhesive of the workpiece. The gist is that it is configured to be in a positional relationship in which the attachment site and the abutting surface are opposed to each other.

  Invention of Claim 4 is the heating apparatus as described in any one of Claims 1-3. By the unit temperature measurement means which measures the temperature of the said unit for a heating, By this unit temperature measurement means A unit temperature determining means for determining whether or not the measured temperature is a predetermined set temperature; and when the determination result by the unit temperature determining means is an affirmative determination, the heating unit is in the non-heating position. And a control means for driving the moving means so as to move toward the heating position.

  According to a fifth aspect of the present invention, in the heating apparatus according to any one of the first to fourth aspects, the moving means is composed of a swinging member that swings about a predetermined axis. The gist of the invention is that the heating unit is connected to the operating point side of the swing member.

  Invention of Claim 6 is a heating apparatus as described in any one of Claims 1-5. WHEREIN: When the said heating unit moves to the said heating position, the said heating unit is made into the said workpiece | work. The gist is that an urging means for urging the urging is provided.

  A seventh aspect of the present invention is the heating apparatus according to any one of the first to sixth aspects, wherein a heat insulating member is interposed between the moving means and the heating unit. Is the gist.

The invention according to claim 8 is the heating device according to any one of claims 1 to 7, wherein the workpiece is a rotor core for a motor.
A ninth aspect of the present invention is the heating apparatus according to any one of the first to eighth aspects, wherein the heating unit has a plurality of different heating positions that contact the surface of the workpiece. The gist is composed of units.

  The invention according to claim 10 is a heating method in which the work is heated to cure the thermosetting adhesive attached to the work by heat transfer through the work. A forward movement step of moving a heating unit having a contact surface capable of surface contact from a non-heating position where the contact surface is separated from the surface of the workpiece to a heating position where the contact surface contacts the surface of the workpiece. And a heating step of heating the workpiece by the heating unit heated at the heating position, and a reverse movement step of moving the heating unit from the heating position to the non-heating position. The gist.

  The invention according to claim 11 is the heating method according to claim 10, wherein in the heating step, the contact and separation between the contact surface of the heating unit and the surface of the workpiece are repeated. The gist is to move the heating unit.

  The invention according to claim 12 is the heating method according to claim 10 or 11, wherein, in the heating step, the heating unit has a temperature higher than a curing temperature of the adhesive. The gist is to be set.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to shorten the hardening time which hardens the thermosetting adhesive adhering to a workpiece | work by heat transfer through a workpiece | work, generation | occurrence | production of the temperature nonuniformity in a workpiece | work can be suppressed.

(First embodiment)
1 to 6 show a first embodiment in which the present invention is embodied in a heating device and a heating method used when a permanent magnet is bonded and fixed to a rotor core for a motor via a thermosetting adhesive. It explains according to.

  As shown in FIGS. 1 and 4, the rotor core (workpiece) 10 of the present embodiment is formed by laminating a plurality of rotor layer plates 10 </ b> A having a substantially circular shape in plan view. A through hole 11 extending along the stacking direction (axial direction) of each rotor layer plate 10A is formed. A plurality (eight in this embodiment) of slits 12 extending in the axial direction of the rotor core 10 are formed as magnet holes at equal intervals in the circumferential direction of the rotor core 10 at the radially outer portion of the rotor core 10. Yes. A permanent magnet 13 is inserted into each slit 12, and a thermosetting adhesive J is interposed between the permanent magnet 13 and the inner surface 12 a of each slit 12. That is, the permanent magnets 13 are bonded and fixed to the rotor core 10 when the adhesive J is cured by heat transfer through the rotor core 10 when the rotor core 10 is heated. The adhesive J in the present embodiment uses a thermosetting resin that cures when the temperature is raised to about 120 ° C. or higher.

Next, the heating apparatus of this embodiment will be described.
As shown in FIGS. 1 and 4, the heating device 14 of the present embodiment includes a plurality (two in this embodiment) of heating units 15 and a plurality (for moving each of the heating units 15 separately). Two cylinders (for example, hydraulic cylinders) 16. Between the heating unit 15 and the cylinder 16, a heat insulating member 17 made of glass fiber solidified with a silicate binder is interposed, and the heating unit 15 and the cylinder 16 are connected via the heat insulating member 17. Has been.

  The heating unit 15 includes a unit main body 18 having a shape obtained by dividing a cylindrical body into a plurality of planes along the axial direction (in this embodiment, two divisions). It is comprised with the material (for example, chromium copper) with a comparatively high rate. Each unit main body 18 is formed such that the radially inner surface portion thereof has an arcuate surface shape corresponding to the outer surface (surface) 10a forming the arcuate surface shape of the rotor core 10. The surface portion that becomes the abutting surface 18 a that can come into surface contact with the outer surface 10 a of the rotor core 10 is formed. Each unit main body 18 includes a plurality of (four in this embodiment) extending along the height direction of the unit main body 18 (the direction orthogonal to the paper surface in FIG. 4A and the vertical direction in FIG. 4B). The heater holes 18b are formed at equal intervals in the circumferential direction.

  Further, in each unit main body 18, a plurality of thermocouple holes 18 c extending along the height direction of the unit main body 18 are formed at both circumferential positions of the heater holes 18 b. However, in the unit main body 18 arranged on one side (the right side in FIG. 1) of each unit main body 18, in the vicinity of the uppermost heater hole 18b in FIG. A thermocouple hole 18c is formed only on the right side). Similarly, in the unit main body 18 arranged on the other side (left side in FIG. 1) of each unit main body 18, in the vicinity of the lowermost heater hole 18b in FIG. A thermocouple hole 18c is formed only on the left side in the circumferential direction.

  Further, in each unit main body 18, each heater hole 18 b and each thermocouple hole 18 c are formed at a portion closer to the radially inner side (abutting surface 18 a side) in the unit main body 18, as shown in FIG. 2. . In the present embodiment, the distance d1 between the inner surface of the heater hole 18b and the contact surface 18a at the portion where the heater hole 18b is formed is set to approximately 0.5 mm. Similarly, in the present embodiment, the distance d2 between the inner surface of the thermocouple hole 18c and the contact surface 18a at the portion where the thermocouple hole 18c is formed is set to about 0.5 mm. Has been. That is, when the heater holes 18b and the thermocouple holes 18c are formed in the unit main body 18, the heater holes 18b and the heater holes 18b as much as possible within a range in which the contact surface 18a side of the unit main body 18 is not damaged. Each thermocouple hole 18 c is formed in the radially inner portion of the unit body 18.

  Each heater hole 18b of the unit main body 18 is provided with a cartridge heater (heat generating means) 19 that generates heat based on external power feeding, and the unit main body 18 is heated as the cartridge heater 19 generates heat. It has become so. Here, as described above, since each of the cartridge heaters 19 is disposed in the radially inner portion of the unit main body 18, the radial inner portion of the unit main body 18 is more inward than the radially outer portion. Also, the temperature rises easily. A thermocouple 20 is provided in each thermocouple hole 18 c of the unit body 18.

  Further, as described above, each unit body 18 is made of a material having a relatively high thermal conductivity. That is, the unit main body 18 is configured to thermally expand when heated with the heat generated by the cartridge heater 19. Therefore, in the case of the present embodiment, each unit body 18 is a surface in which the contact surface 18a corresponds to the surface shape of the outer surface 10a of the rotor core 10 when the cartridge body 19 is heated and thermally expanded as the cartridge heater 19 generates heat. It is formed so as to form a shape (that is, in surface contact). Specifically, when it is heated to a set temperature (in this embodiment, a temperature within the range of 280 ° C. to 320 ° C.) sufficiently higher than the curing temperature (approximately 120 ° C.) of the adhesive J and thermally expands. The unit body 18 is formed such that the contact surface 18a is in surface contact with the outer surface 10a of the rotor core 10.

  Therefore, in the case of the present embodiment, the contact surface 18a of each unit body 18 is shown in FIG. 3 when the unit body 18 is not sufficiently heated by the cartridge heater 19 and the temperature does not rise to the set temperature. As shown, the surface shape of the outer surface 10a of the rotor core 10 does not correspond. That is, even if each unit body 18 is moved to the rotor core 10 side by driving each cylinder 16 in this insufficient heating state, the contact surface 18a and the outer surface 10a of the rotor core 10 are in surface contact. The gap S is formed between the two.

  Further, the heating unit 15 is configured such that each cartridge heater 19 in the unit main body 18 is positioned in the vicinity of the slit 12 of the rotor core 10 when the contact surface 18a comes into surface contact with the outer surface 10a of the rotor core 10. It is configured. That is, in the state where the contact surface 18 a is in surface contact with the outer surface 10 a of the rotor core 10, each cartridge heater 19 extends in the radial direction from the center of the rotor core 10 through the center of the pole in the permanent magnet 13 in the slit 12. It is located on a straight line SL (a straight line indicated by a one-dot chain line in FIG. 4A and corresponding to a normal line in the rotor core 10). In other words, in a state where the contact surface 18a is in surface contact with the outer surface 10a of the rotor core 10, each cartridge heater 19 is opposed to the portion where the slit 12 is formed in the rotor core 10 with the contact surface 18a interposed therebetween. Positional relationship. In the present embodiment, the straight line SL passes through the center of the rotor core 10 and the circumferential center of the slit 12 (that is, the longitudinal center of the permanent magnet 13 in the slit 12).

  On the other hand, each cylinder 16 is provided with a rod 16a whose tip is connected to the heat insulating member 17 so as to be able to extend and contract. Then, each cylinder 16 extends the rod 16a so that the heating unit 15 (unit main body 18) heated by each cartridge heater 19 is pressed against the outer surface 10a of the rotor core 10 by the contact surface 18a. It is moved to the heating position (the position shown in FIG. 4A). In this case, each heating unit 15 is moved by each cylinder 16 so that the heating positions in contact with the outer surface (surface) 10a of the rotor core 10 are different from each other. Further, each cylinder 16 contracts the rod 16a to cause the heating unit 15 (unit main body 18) to move in a non-heated position (shown in FIG. 1) in which the contact surface 18a is separated from the outer surface 10a of the rotor core 10. Position). That is, in the present embodiment, the cylinder 16 urges each heating unit 15 toward the rotor core 10 at the heating position, and moving means for moving each heating unit 15 between the heating position and the non-heating position. It functions as a biasing means.

  Further, as shown in FIG. 5, the heating device 14 of the present embodiment includes a control unit 21 that connects the thermocouple 20 to the input side and connects the cartridge heaters 19 and the cylinders 16 to the output side. ing. That is, the control unit 21 detects the temperature of each unit body 18 based on the signal from each thermocouple 20. Therefore, in the present embodiment, each thermocouple 20 and the control unit 21 constitute unit temperature measuring means for measuring the temperature of the heating unit 15 (unit main body 18).

  The control unit 21 controls power supply to each cartridge heater 19 based on the detected temperature of the unit main body 18. That is, the control unit 21 controls the cartridge heaters 19 so that the temperature of the unit main body 18 becomes the set temperature that is sufficiently higher than the curing temperature (approximately 120 ° C.) of the adhesive J. The power supply is controlled. In addition to the power supply control for the cartridge heater 19, the control unit 21 also controls the driving state of each cylinder 16 (the expansion and contraction operation of the rod 16a).

Next, a heating method using the heating device 14 of the present embodiment will be described.
First, as shown in FIG. 1, the rotor core 10 to be heated is installed in the heating device 14 in which the rods 16a of the cylinders 16 are contracted and the heating units 15 are in the non-heating position. The In this case, a permanent magnet 13 is inserted into each slit 12 of the rotor core 10 with the adhesive J, which has not yet been thermally cured, interposed. Then, the control unit 21 executes power supply control for causing the cartridge heater 19 to generate heat based on a signal input from the thermocouple 20. Then, the unit main body 18 of the heating unit 15 is heated as the cartridge heaters 19 generate heat, and the temperature of the heating unit 15 (unit main body 18) rises toward the set temperature.

  Then, the forward movement process of moving the heating unit 15 from the non-heating position toward the heating position, the heating process of heating the rotor core 10 by the heating unit 15, and the heating unit 15 from the heating position to the non-heating position. The backward movement process of moving toward is sequentially performed based on the control of the control unit 21. First, the forward movement control routine executed by the control unit 21 in the forward movement process will be described based on the flowchart shown in FIG. 6, and thereafter, the heating process and the backward movement process will be described in this order.

  When the forward movement control routine is started, first, the control unit 21 determines whether or not the temperature of each heating unit 15 (unit main body 18) is the preset temperature ST set in advance ( Step S10). In this respect, the control unit 21 functions as a unit temperature determination unit that determines whether or not the temperature measured by the unit temperature measurement unit (the control unit 21 and the thermocouple 20) is a preset temperature ST. Will do. And when the determination result of this step S10 is negative determination, the control part 21 repeats the determination process of this step S10 until the determination result of step S10 becomes affirmation determination.

  On the other hand, if the determination result in step S10 is affirmative, the control unit 21 drives each cylinder 16 (specifically, the rod 16a extends), thereby causing each heating unit 15 to move to the non-heating state. Move from the heating position toward the heating position (step S11). In this regard, the control unit 21 drives the cylinder (moving means) 16 so that the heating unit 15 moves from the non-heating position toward the heating position when the determination result in step S10 is affirmative. It will also function as a means.

  Subsequently, the control unit 21 determines whether or not each of the heating units 15 has reached the heating position (step S12). When this determination result is a negative determination (that is, when each heating unit 15 has not yet reached the heating position), the control unit 21 performs step S12 until the determination result of step S12 becomes a positive determination. Repeat the determination process. On the other hand, when the determination result in step S12 is affirmative (that is, when each heating unit 15 has reached the heating position), the control unit 21 stops driving each cylinder 16 (step S13). The dynamic processing routine ends.

  Whether or not each heating unit 15 has reached the heating position in step S12 is determined by a limit switch (not shown) provided with each heating unit 15 at a predetermined position as the rod 16a of the cylinder 16 extends. It is determined whether or not a signal output from the limit switch is detected by the control unit 21 when it comes into contact. When the drive of each cylinder 16 is stopped in step S13, the contact surface 18a of each heating unit 15 (unit body 18) comes into surface contact with the outer surface 10a of the rotor core 10, respectively. That is, the state shown in FIG. 4 is obtained.

  Then, the heating process starts, and the rotor core 10 is heated by each heating unit 15 for a predetermined heating time (1.5 minutes to 3 minutes). That is, the controller 21 controls the power supply state to each cartridge heater 19 based on the signal input from the thermocouple 20 so that the temperature of each heating unit 15 maintains the set temperature ST. Then, heat is directly transferred from the contact surface 18a of the unit body 18 in the heating unit 15 heated to the set temperature ST to the outer surface 10a of the rotor core 10 without interposing air, and the heat is gradually increased. It is transmitted to the entire rotor core 10.

  At that time, each slit 12 to which the adhesive J on the rotor core 10 side is applied (attached) and each cartridge heater 19 on the heating unit 15 side are in a positional relationship facing each other with the contact surface 18a interposed therebetween. In addition, heat associated with the heat generated by each cartridge heater 19 is easily transmitted to the formation portion of each slit 12 in the rotor core 10. Further, since one cartridge heater 19 is allocated and arranged corresponding to one slit 12, heat is uniformly transmitted to the formation portion of each slit 12 in the rotor core 10.

  When the temperature of the portion where each slit 12 is formed in the rotor core 10 exceeds the curing temperature (approximately 120 degrees) of the adhesive J based on heat transfer from the contact surface 18a of the unit main body 18 in surface contact, the adhesive J As a result of the temperature exceeding the curing temperature, the adhesive J is thermally cured. Then, the permanent magnets 13 inserted into the slits 12 are securely bonded and fixed to the rotor core 10 by the adhesive action of the thermosetting adhesive J without causing poor adhesion.

  Then, when heating time passes, a heating process will be complete | finished and it will transfer to a backward movement process. That is, when the rod 16a of each cylinder 16 contracts based on the control of the control unit 21, each heating unit 15 arranged at the heating position moves toward the non-heating position. When each heating unit 15 reaches the non-heating position, the driving of each cylinder 16 is stopped, and the backward movement process ends (that is, returns to the state shown in FIG. 1). Then, the rotor core 10 that has been subjected to the heat treatment is carried out of the heating device 14 and cooled. Subsequently, the rotor core 10 before the heat treatment is newly carried into the heating device 14, and the respective steps (the forward movement step, the heating step, and the backward movement step) are performed in order.

Therefore, in this embodiment, the following effects can be obtained.
(1) Each heating unit 15 (unit main body 18) moved to the heating position based on driving of the cylinder (moving means) 16 has a contact surface 18a in surface contact with the outer surface 10a of the rotor core 10, and thus each cartridge heater (Heat generation means) The heat based on the heat generated by the 19 can be directly transmitted to the rotor core (workpiece) 10 without interposing air. Therefore, heat from each heating unit 15 is efficiently and promptly transmitted to the formation portion of each slit 12 in the rotor core 10. Accordingly, the curing time for curing the adhesive J applied in each slit 12 of the rotor core 10 can be shortened, and the occurrence of temperature unevenness in the rotor core 10 can be suppressed.

  (2) Moreover, when each heating unit 15 (unit main body 18) is thermally expanded based on heating by each cartridge heater (heat generating means) 19, the contact surface 18a is the surface shape of the outer surface 10a of the rotor core 10. Since the corresponding surface shape is obtained, the contact surface 18a can be reliably brought into surface contact with the outer surface 10a of the rotor core 10 in the heating process.

  (3) When each heating unit 15 is arranged at the heating position, each cartridge heater (heat generating means) 19 has a positional relationship with the formation portion of each slit 12 in the rotor core (workpiece) 10 in terms of the contact surface 18a. It is a positional relationship facing each other. Therefore, the heat based on the heat generated by each cartridge heater 19 can be transmitted to the formation part of each slit 12 in the rotor core 10 (that is, the part where the adhesive J is applied) at the shortest distance.

  (4) When the temperature of each heating unit 15 (unit main body 18) is not the set temperature (temperature in the range of 280 ° C. to 320 ° C.) ST, the heat treatment for the rotor core (work) 10 is not executed. ing. Therefore, it is possible to suppress the occurrence of poor adhesion between the permanent magnets 13 and the rotor core 10 due to the fact that heat is not sufficiently transmitted to the formation portions of the slits 12 in the rotor core 10.

  (5) Since heat based on the heat generated by each cartridge heater (heat generating means) 19 is suppressed by the heat insulating member 17 from being transmitted to the cylinder 16 side, the cylinder 16 as the moving means is not operated properly due to unnecessary heating. Such a fear can be avoided.

(6) Each heating unit 15 (unit body 18) has a set temperature (280 ° C. to 280 ° C.) that is sufficiently higher than the curing temperature (approximately 120 ° C.) of the adhesive J by the heat generated by each cartridge heater (heat generating means) 19. (Temperature within the range of 320 ° C.) ST. Therefore, the amount of heat necessary to cure the adhesive J can be quickly supplied to the rotor core (workpiece) 10 side, so that the curing time of the adhesive J can be shortened favorably.
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in the configuration of moving means for moving each heating unit 15. Accordingly, in the following description, parts different from those of the first embodiment will be mainly described, and the same or corresponding member configurations as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. Shall.

  As shown in FIG. 7, the heating device 14 of the present embodiment moves a plurality of (two in the present embodiment) heating units 15 for heating the rotor core 10 and the heating units 15 to each other. The rotor core 10 is mounted on the mounting surface (upper surface in FIG. 7) 31a of the mounting block 31. As shown in FIG.

  The moving device 30 is a so-called toggle clamp having a toggle mechanism, and its base 32 is fastened and fixed to a side wall 31b of the mounting block 31 by a plurality of bolts 32a (only two are shown in FIG. 7). The moving device 30 is provided with a clamp handle 33 and a clamp arm 34, and the clamp handle 33 has a base end portion 33 a that can be pivoted (oscillated) through a first fulcrum pin 35. Supported). The distal end portion 33b of the clamp handle 33 is an operation portion that is manually operated by an operator when the clamp handle 33 is swung.

  On the other hand, the clamp arm (swing member) 34 has a base end portion 34a supported by the base portion 32 via a second fulcrum pin (predetermined shaft) 36 so as to be rotatable (swingable). The two fulcrum pins 36 are configured to swing around the fulcrum. A spring B as an urging means is provided on the distal end 34 b side (action point side) of the clamp arm 34, and the heating unit 15 (unit main body 18) is interposed via the spring B and the heat insulating member 17. ) Are connected.

  A link member 37 is interposed between the clamp handle 33 and the clamp arm 34. One end of the link member 37 is supported via a first pin 38 so as to be pivotable to a position closer to the distal end portion 33 b than the middle in the length direction of the clamp handle 33, and the other end is interposed via a second pin 39. The clamp arm 34 is rotatably supported at a position closer to the base end 34 a than in the middle of the length direction. Therefore, when the clamp handle 33 is swung with the first fulcrum pin 35 as a fulcrum, the clamp arm 34 is swung in conjunction with the clamp handle 33 by receiving a push-up force from the link member 37. It has become.

  That is, when the clamp handle 33 is swung from the position indicated by the two-dot chain line in FIG. 7 to the position indicated by the solid line in FIG. The heating unit 15 moves from a non-heating position (a position indicated by a two-dot chain line in FIG. 7) toward a heating position (a position indicated by a solid line in FIG. 7). Here, the length L1 of the spring B when the heating unit 15 is disposed at the heating position is shorter than the length L2 of the spring B when the heating unit 15 is disposed at the non-heating position. That is, in the heating position, the spring B biases the heating unit 15 toward the rotor core 10. Further, when the heating unit 15 is disposed at the heating position, a stopper portion 37 a formed on the other end side of the link member 37 contacts the clamp arm 34. Therefore, in the heating position, the clamp arm 34 cannot be swung in the direction away from the rotor core 10 unless the clamp handle 33 is swung in the non-heating position by manual operation.

Therefore, according to the second embodiment, the following effects can be further obtained.
(7) When the heating unit 15 is linearly reciprocated by driving the cylinder 16 as in the first embodiment, even if the heating unit 15 moves from the heating position to the non-heating position, the rotor core 10 The rotor core 10 may be obstructed when the rotor core 10 is installed in the heating device 14 or carried out of the heating device 14. And in order not to get in the way, it is necessary to lengthen the stroke length of the rod 16a of the cylinder 16, and as a result, the whole heating apparatus 14 will enlarge. On the other hand, when the heating unit 15 is moved between the heating position and the non-heating position by the swing of the clamp arm 34 that is the swinging member as in the second embodiment, the heating is performed at the non-heating position. The unit 15 is not located on the side of the rotor core 10. Therefore, when the rotor core 10 is installed in the heating device 14 or carried out of the heating device 14, the heating unit 15 does not get in the way, and the heating device 14 as a whole can be prevented from becoming large.

  (8) Since the heating unit 15 arranged at the heating position is biased toward the rotor core (workpiece) 10 by the spring (biasing means) B, the heating unit 15 (unit body 18) is pressed in the heating process. The surface contact state between the contact surface 18a and the outer surface 10a of the rotor core (workpiece) 10 can be favorably maintained.

In addition, you may change each said embodiment into the following other embodiment (another example).
In each of the above embodiments, the set temperature ST in each heating unit 15 (unit main body 18) is an arbitrary temperature (for example, a temperature around 200 ° C.) as long as it is higher than the curing temperature (approximately 120 ° C.) of the adhesive J. ). However, it is desirable that the heating time during which each heating unit 15 heats the rotor core 10 in the heating process is changed according to the change in the set temperature ST.

  In the first embodiment, each cylinder 16 repeats contact and separation between the contact surface 18a of the unit body 18 (heating unit 15) and the outer surface 10a of the rotor core 10 during the heating process. It may be driven. When it does in this way, while being able to suppress that the temperature of the formation part of each slit 12 in the rotor core 10 becomes high too much, it can suppress that the adhesive agent J is heated too much and carbonizes.

  In each of the above embodiments, temperature measuring means (thermocouple or the like) for measuring the temperature in the vicinity of the formation site of each slit 12 in the rotor core 10 installed in the heating device 14 may be provided. The heating process may be terminated when the temperature in the vicinity of the formation site of each slit 12 reaches a predetermined temperature (that is, a temperature corresponding to the curing temperature of the adhesive J). When comprised in this way, while being able to suppress the fall of the production efficiency by heating the rotor core 10 over a time more than necessary, the adhesive defect of each permanent magnet 13 and the rotor core 10 by not fully transmitting heat | fever. Occurrence can be avoided well.

  In each of the above embodiments, the heating device 14 may be configured by an arbitrary number of three or more heating units as long as it surrounds the rotor core 10 from the radial direction. For example, the heating device 14 may be composed of eight heating units 50 as shown in FIG. That is, each heating unit 50 is provided with one cartridge heater 19 and two thermocouples 20, and each heating unit 50 corresponds to a portion where each slit 12 is formed in the rotor core 10. Has been placed.

  -Moreover, the heating apparatus 14 may be comprised from the four units 51 for a heating, as shown in FIG. That is, each of these heating units 51 is provided with two cartridge heaters 19 and four thermocouples 20. Also in this case, when each heating unit 51 is disposed at the heating position, each cartridge heater 19 is in a positional relationship that faces the formation portion of each slit 12 in the rotor core 10 with the contact surface 18a interposed therebetween. In FIG. 8 and FIG. 9, illustration of the cylinder 16 and the moving device 30 is omitted for convenience of explanation.

  In each of the above embodiments, the heating device 14 may be configured to heat only the vicinity of each slit 12 formation portion as long as the formation portion of each slit 12 in the rotor core 10 can be heated. For example, as shown in FIG. 10, when the slit forming portions 53 including the two slits 53 </ b> A are formed in four locations on the rotor core 10, the heating device 14 is used to heat only the vicinity of each slit forming portion 53. Four heating units 52 are provided. In such a configuration, in the rotor core 10, the portion corresponding to each heating unit 52 (slit forming portion 53) is sufficiently heated, but the portion not corresponding to each heating unit 52 is not located. As compared with the portion corresponding to the position of each heating unit 52, the temperature is not increased so much. Therefore, the time taken to sufficiently cool the rotor core 10 after the heat treatment is shortened as compared with the case of each of the above embodiments. In FIG. 10, the cylinder 16 and the moving device 30 are not shown for convenience of explanation.

  Further, two slits 53A are formed in each slit forming portion 53 so as to be substantially V-shaped, and a permanent magnet 13A is inserted into each slit 53A. In this case, the center of the pole of the permanent magnet 13A is formed in each slit forming portion 53 between the two slits 53A, and the cartridge is placed on a straight line SL passing through the center of the permanent magnet 13A and the center of the rotor core 10. The heater 19 is positioned when each heating unit 52 is arranged at the heating position.

  In each of the above-described embodiments, when the heating unit 15 is disposed at the heating position, the cartridge heaters 19 necessarily face each other across the contact surface 18a in the positional relationship with the formation portion of each slit 12. It does not have to be.

  In each of the above embodiments, the heating device 14 does not cure the adhesive J for fixing the permanent magnet 13 to the rotor core 10, but rather the adhesive for fixing the rotor layer plates forming the rotor core 10. It may be used when J is cured.

  In each of the above embodiments, the heating device 14 may be used when curing a thermosetting adhesive attached to a rotor core (workpiece) having an arbitrary shape (for example, an elliptical shape). Further, the heating device 14 may have a single heating unit depending on the shape of the rotor core (work) to which the thermosetting adhesive is attached and the position of the adhesive attached to the rotor core.

The schematic plan view of the heating apparatus in which the unit for heating is in a non-heating position in 1st Embodiment. The partially expanded view in FIG. The schematic top view which shows the unit for heating and rotor core with insufficient heating. (A) is a schematic plan view of the heating apparatus in which the heating unit is in the heating position, and (b) is a cross-sectional view taken along line AA in FIG. The block diagram which shows the control structure in 1st Embodiment. The flowchart explaining the forward movement control routine in 1st Embodiment. The partially broken sectional view which shows the moving apparatus in 2nd Embodiment. The schematic plan view which shows the heating apparatus of another example. The schematic plan view which shows the heating apparatus of another example. The top view which shows the heating apparatus of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Rotor core (workpiece), 10a ... Outer side surface (surface), 14 ... Heating device, 15, 50, 51, 52 ... Heating unit, 16 ... Cylinder (moving means) 17 ... Heat insulation member, 18a ... Contact surface, DESCRIPTION OF SYMBOLS 19 ... Cartridge heater (heat generating means), 20 ... Thermocouple (unit temperature measuring means), 21 ... Control part (unit temperature measuring means, unit temperature judging means, control means), 30 ... Moving device (moving means), 34 ... Clamp arm (oscillating member), 36 ... second fulcrum pin (predetermined axis), B ... spring (biasing means), J ... adhesive, ST ... set temperature.

Claims (12)

In the heating device that cures the thermosetting adhesive attached to the workpiece by heating the workpiece by heat transfer through the workpiece,
A heating unit having a contact surface that can come into surface contact with the surface of the workpiece; the heating unit is provided with heat generating means for generating heat based on external power supply; and the heating unit is mounted on the contact surface. A heating apparatus provided with a moving means for moving between a heating position that contacts the surface of the workpiece and a non-heating position where the contact surface separates from the surface of the workpiece. The said heating unit is formed so that the said contact surface may make the surface shape corresponding to the surface shape of the surface of the said workpiece | work when thermally expanding based on the heating by the said heat_generation | fever means. Heating device. The heating unit is configured such that when the heating unit is disposed at the heating position, the heat generating unit is in a positional relationship in which the adhesive adhesion portion of the workpiece faces the contact surface. The heating apparatus according to claim 1 or 2. Unit temperature measuring means for measuring the temperature of the heating unit, unit temperature determining means for determining whether or not the temperature measured by the unit temperature measuring means is a preset temperature, and the unit temperature determination Control means for driving the moving means so that the heating unit moves from the non-heating position toward the heating position when the determination result by the means is affirmative. The heating device according to any one of 3. The moving means is composed of a rocking member that rocks about a predetermined axis as a fulcrum, and the heating unit is connected to an action point side of the rocking member. A heating apparatus according to claim 1. The heating apparatus according to any one of claims 1 to 5, further comprising a biasing unit that biases the heating unit toward the workpiece when the heating unit moves to the heating position. . The heating apparatus according to any one of claims 1 to 6, wherein a heat insulating member is interposed between the moving means and the heating unit. The heating device according to any one of claims 1 to 7, wherein the workpiece is a rotor core for a motor. The heating device according to any one of claims 1 to 8, wherein the heating unit is configured by a plurality of heating units having different heating positions in contact with the surface of the workpiece. In a heating method in which the work is heated to cure the thermosetting adhesive attached to the work by heat transfer through the work,
A heating unit having a contact surface that can come into surface contact with the surface of the workpiece, from a non-heating position where the contact surface is separated from the surface of the workpiece to a heating position where the contact surface contacts the surface of the workpiece. A forward movement step of moving, a heating step of heating the workpiece by the heating unit heated at the heating position, and a backward movement step of moving the heating units from the heating position to the non-heating position. And a heating method. The heating method according to claim 10, wherein in the heating step, the heating unit is moved so that contact and separation between the contact surface of the heating unit and the surface of the workpiece are repeated. The heating method according to claim 10 or 11, wherein in the heating step, the temperature of the heating unit is set to be higher than a curing temperature of the adhesive.

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