JP2008236893A - Apparatus and method for manufacturing stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for manufacturing a stator wherein annularly disposed split cores can be surely fixed in a housing. <P>SOLUTION: The stator manufacturing apparatus 100 is used to manufacture a stator 51 by fixing split cores 12 in a housing 31. The manufacturing apparatus includes a pressing means 21 for pressing the annularly disposed split cores 12 in the direction of their axial center; a load detecting means 21c for detecting load when the annularly disposed split cores 12 are pressed; a guide ring 22, through which the annularly disposed split cores 12 pressed are passed and which guides the passed split cores 12 so that the split cores are press fit into a housing 31; an outside diameter determining means S3 for determining whether the outside diameter of the annularly disposed split cores 12 is within a predetermined range, based on the load detected, when the annularly disposed split cores 12 are inserted into the guide ring 22; and a housing selecting means S5 that when the outside diameter of the annularly disposed split cores 12 is within the predetermined range, selects a housing 31 to be supplied to the guide ring 22, based on the load detected at the time of insertion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method for a stator of a rotating electrical machine.

  2. Description of the Related Art Conventionally, a rotating electrical machine in which a plurality of divided cores are fixed to a housing to manufacture a stator, and the stator is installed on the rotating electrical machine body via the housing is widely known. In such a rotating electrical machine, the dimensional accuracy of the gap between the inner peripheral surface of the stator and the outer peripheral surface of the rotor affects performance such as rotational efficiency.

Patent Document 1 discloses a stator measuring device that measures the inner diameter of a split stator core based on a reference position portion of a housing, and thereby checks whether the gap between the rotor outer peripheral surface and the stator inner peripheral surface is uniform. Has been.
JP 2006-254519 A

  By the way, in the split core of the rotating electrical machine described above, since the dimensional accuracy between the split cores varies, the outer diameter varies when the split cores are arranged in an annular shape (hereinafter referred to as “annular split core”). . When fixing the annular split core to the housing, if the outer diameter of the annular split core is small, the force with which the housing tightens the annular split core (hereinafter referred to as “housing clamping force”) is reduced and fixed to the housing. become unable. Further, if the outer diameter of the annular split core is large, there is a problem that the housing tightening force becomes too large and the split core is broken.

  However, in the stator measuring apparatus described in Patent Document 1, even if it is possible to determine whether or not the gap between the outer circumferential surface of the rotor and the inner circumferential surface of the stator is uniform, the annular split core has an appropriate housing tightening force. It cannot be determined whether it can be fixed to the housing, that is, whether the annular split core can be reliably fixed to the housing.

  Then, an object of this invention is to provide the stator manufacturing apparatus and stator manufacturing method which can fix the division | segmentation core arrange | positioned in the annular | circular shape to a housing reliably.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected, it is not limited to this.

  The present invention is a stator manufacturing apparatus (100) for manufacturing a stator (51) by fixing a split core (12) arranged in an annular state to a housing (31), the split core (12) in the annular state ) In the axial direction, load detecting means (21c) for detecting a load when the annular core (12) is being pressed, and the pressing means ( 21) A guide ring for inserting the annular split core (12) pressed by 21) and guiding the annular split core (12) after passing through the housing (31). (22) and whether or not the outer diameter of the annular split core (12) is within a predetermined range based on the load when the annular split core (12) is inserted into the guide ring (22) Outer diameter determining means for determining Step S3) and a housing (31) to be supplied to the guide ring (22) based on the load when inserted when the outer diameter of the annular split core (12) is within a predetermined range. Housing selection means (step S5) for selection.

  According to the present invention, based on the load when the annular split core is inserted into the guide ring, it is determined whether or not the outer diameter of the split split core is within a predetermined range. Since the housing for press-fitting the split core in the state is selected, the housing tightening force can be stabilized even if the outer diameter of the split core in the annular state varies, and the split core in the annular state can be reliably It is possible to press-fit and fix to.

(First embodiment)
Hereinafter, a first embodiment will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an overall configuration of a stator manufacturing apparatus 100.

  The stator manufacturing apparatus 100 includes a split core supply unit 10, a split core press-fit unit 20, a housing supply unit 30, a housing stock unit 40, and a stator discharge unit 50.

  The split core supply unit 10 supplies an annular split core 12 having a plurality of split cores 11 arranged in an annular shape to the split core press-fitting unit 20. The split core 11 is composed of a laminated steel sheet obtained by laminating electromagnetic steel sheets and a coil wound around the laminated steel sheet.

  The housing supply unit 30 supplies the divided core press-fit portion 20 with the housing 31 into which the annular split core 12 is press-fit. In a state where the housing 31 and the annular split core 12 are press-fitted, they are installed in a rotating electric machine main body (not shown). A plurality of the housings 31 are stored in the housing stock portion 40. Two types of housings 31a and 31b having different inner diameters are stored in the housing stock portion 40, and the housing 31a or the housing 31b is selected as necessary and supplied from the housing stock portion 40 to the housing supply portion 30. Here, the inner diameter of the housing 31a is set smaller than that of the housing 31b.

  The split core press-fit portion 20 presses the annular split core 12 supplied from the split core supply portion 10 into the housing 31 supplied from the housing supply portion 30 to manufacture the stator 51. The stator 51 thus manufactured is discharged from the split core press-fit portion 20 to the stator discharge portion 50.

  Next, the configuration of the above-described split core press-fit portion 20 will be described.

  The split core press-fit portion 20 includes a press-fitting device 21, an annular split core 12 supplied from the split core supply portion, a guide ring 22, a housing 31 supplied from the housing supply portion 30, and a stopper 23 in order from the upper side in the figure. Arranged concentrically.

  The press-fitting device 21 includes a hydraulic press 21 a that is driven by hydraulic pressure, and a flange 21 b that fixes the annular split core 12. A press-fit load sensor 21c for detecting a press-fit load is installed between the hydraulic press 21a and the flange 21b. The press-fit load sensor 21 c detects a press-fit load when the press-fitting device 21 press-fits the annular split core 12 into the guide ring 22 or the housing 31, and outputs a detection signal to the controller 60.

  A guide ring 22 is disposed between the press-fitting device 21 and the housing 31 described above. The guide ring 22 has a tapered portion 22a whose inner diameter gradually decreases in the axial direction and an identical diameter portion 22b having a constant inner diameter. The annular split core 12 is gradually reduced in diameter by the tapered portion 22a, and is guided to the housing 31 while being reduced in diameter by the same diameter portion 22b.

  A housing 31 is installed below the guide ring 22. The annular split core 12 is press-fitted into the housing 31. Since the stopper 23 is disposed below the housing 31, the annular split core 12 is prevented from being pushed too far beyond the reference position by the press-fitting device 21.

  The above-described stator manufacturing apparatus 100 includes a controller 60 for supplying the annular split core 12 and controlling the press-fitting device 21. The controller 60 includes a CPU, a ROM, a RAM, and an I / O interface. Detection signals from various sensors that control the press-fitting load sensor 21 c of the press-fitting device 21 and the stator manufacturing device 100 are input to the controller 60. Then, the controller 60 controls the stator manufacturing apparatus 100 based on these detection signals.

  In the split core press-fitting portion 20 of the stator manufacturing apparatus 100 configured as described above, the annular split core 12 is press-fitted into the housing 31 via the guide ring 22 by the press-fitting device 21. Then, the annular split core 12 is fixed to the housing 31 by the housing tightening force generated by press-fitting the annular split core 12 into the housing 31, and the stator 51 is manufactured.

  By the way, in the stator 51 of the rotating electrical machine, the dimensional accuracy between the divided cores varies when the divided cores are manufactured, and thus the outer diameter when the annular divided core 12 is formed varies. That is, if the outer diameter of the annular split core 12 is small, the housing clamping force becomes small and the annular split core 12 cannot be fixed to the housing 31. Further, if the outer diameter of the annular split core 12 is large, the housing tightening force becomes too large and the split core 11 is broken. As described above, there is a problem that the annular divided core 12 cannot be reliably fixed to the housing due to the variation in the outer diameter of the annular divided core 12 due to the dimension system between the divided cores.

  Therefore, in order to solve the above problems, it is conceivable to measure the outer diameter of the annular split core 12.

  FIG. 13 is a diagram illustrating an outer diameter measuring device 300 that measures the outer diameter of the annular split core 12.

  In the outer diameter measuring apparatus 300, as shown in FIG. 13, each split core 11 of the annular split core 12 is pressed toward the center of the annular split core 12 with a constant force by the pressing mechanism 310. Measure the outer diameter of the annular split core. Then, it is determined whether or not the measured outer diameter of the annular split core 12 is within a predetermined range, and only the annular split core 12 within the predetermined range is press-fitted into the housing 31 to solve the above problem.

  However, in the outer diameter measuring device 300 that directly measures the outer diameter of the annular split core 12, it is difficult to press uniformly by the pressing means, and the pressing means 310 is required for each split core 11, so the number of split cores is large. In many stators 51, an apparatus itself will enlarge.

Therefore, in the stator manufacturing apparatus 100 of the first embodiment, the annular split core 12 is press-fitted into the housing 31 via the guide ring 22 by the press-fitting device 21 (pressing step).
At this time, the guide ring 22 is inserted through the annular split core 12 pressed by the press-fitting device 21 and guides the annular split core 12 to be press-fitted into the housing 31 (guide process). Then, a press-fit load when the annular split core 12 is inserted into the guide ring 22 (hereinafter referred to as “guide ring press-fit load”) is detected (load detection step), and the annular split core 12 is based on the detected weight. It is determined whether or not the outer diameter is within a predetermined range (outer diameter determination step). Here, when the outer diameter of the annular split core 12 is within a predetermined range, the housing 31 into which the annular split core 12 is press-fitted is selected from the above-described guide ring press-fit load (housing selection step), and the selected housing is selected. The annular split core 12 is press-fitted into 31. Further, the stator manufacturing apparatus 100 detects a press-fit load (hereinafter referred to as “housing press-fit load”) when the annular split core 12 is press-fitted into the housing 31 (load detection step), and the annular shape is based on the detected load. It is determined whether or not the split core 12 is securely press-fitted and fixed to the housing 31 (press-fit determination step). This solves the above problem that it cannot be determined whether or not the annular split core 12 is securely fixed to the housing 31.

  Hereinafter, the guide ring press-fit load and the housing press-fit load will be described.

  The guide ring press-fitting load will be described with reference to FIGS. 2 (A) and 2 (B). FIG. 2A shows the press-fit position of the annular split core 12 when the annular split core 12 is press-fit into the guide ring 22. FIG. 2B shows the press-fitting load at the press-fitting position of FIG.

As shown in FIG. 2A, the annular split core 12 is pressed and pressed from the tapered portion 22a of the guide ring 22 toward the same diameter portion 22b. The press-fitting load at the time of press-fitting in this way changes according to the press-fitting position of the annular split core 12 with respect to the guide ring 22 as shown in FIG. That is, in FIGS. 2A and 2B, the press-fitting load continues to increase from position I to position II where the annular divided core 12 is reduced in diameter, and the annular divided core 12 is pushed into the same diameter portion 22b. From position II to position III, the press-fit load is almost constant. In the present embodiment, detected by press-fitting load sensor 21c of the press-fitting load at the position where the press-fitting load is not increased as a guide ring press-fitting load P _G.

Then, since the outer diameter of the annular split core 12 on the basis of the detected guide ring fit load P _G as described above to determine whether within a predetermined range, the inner diameter of the same diameter 22b of the guide ring 22 is less It is set like this.

Figure 3 is a diagram showing the guide ring fit load P _G when press-fitting the annular split cores 12 having different outer diameters in the guide ring 22. The horizontal axis inner diameter of the same diameter 21b of the guide ring 22 (hereinafter referred to as "guide ring inside diameter".), And the vertical axis indicates the guide ring press-fitting load P _G.

  In the lines A, B, and C shown in FIG. That is, the outer diameter of the annular split core 12 indicated by line A is the smallest within the range of variation, and the outer diameter of the annular split core 12 indicated by line C is the largest within the range of variation. is there.

As shown in FIG. 3, the guide ring press-fit load P _G as the guide ring inner diameter is large is reduced. Here, the range of the broken line area S guide ring inner diameter is too large, the guide ring fit load P _G be the outer diameter is changed annular split core 12 hardly changes, based on the guide ring press-fit load P _G Variation in the outer diameter of the split core 12 cannot be determined. Therefore, the guide ring inner diameter, the change of the guide ring press-fitting load _{P G (P GA, P GB} , P GC) can be detected, and guide ring fit load maximum value P _C is press-fit load split core 11 is broken The inner diameter R ₁ is set smaller than P _Gmax . In order to facilitate the press-fit to the housing 31 of the annular split core 12, the guide ring inner diameter R ₁ is set smaller than the housing inside diameter.

  Next, the housing press-fit load when the annular split core 12 is press-fit into the housing 31 will be described with reference to FIG.

Figure 4 is a diagram showing the housing press-fit load P _H when press-fitting the annular split core 12 to the housing 31. The horizontal axis indicates the time after the annular divided core 12 is press-fitted into the housing 23, and the vertical axis indicates the press-fitting load at that time.

The annular split core 12 is pressed into the housing 31 until it comes into contact with the stopper 23 (see FIG. 1). Therefore, as shown in FIG. 4, the press-fitting load starts to gradually increase from time t ₀ when press-fitting into the housing 31 is started. Then, the press-fit load is substantially constant from time t ₁ to time t _{2 when the} annular split core 12 is completely pushed into the housing and comes into contact with the stopper 23. After time t ₂ , even if the press-fitting device 21 tries to push in the annular split core 12, the press-fit load increases rapidly because the annular split core 12 is in contact with the stopper 23. In the present embodiment, the press-fit load at time t ₁ the press-fitting load is substantially constant as a housing press-fit load P _H, is detected by the press-fitting load sensor 21c. The annular split core 12 on the basis of the housing press-fit load P _H to determine whether or not it is securely fixed to the housing 31.

  Below, the control which the controller 60 performs at the time of stator manufacture is demonstrated with reference to FIGS.

  FIG. 5 is a flowchart showing a control routine performed by the controller 60.

  In step S <b> 1, the controller 60 supplies the annular split core 12 of the split core supply unit 10 between the press-fitting device 21 and the guide ring 22 of the split core press-fitting unit 20.

  In step S2, the controller 60 drives the press-fitting device 21, starts press-fitting the annular split core 12 into the guide ring, and proceeds to step S3.

In step S3, the controller 60 performs a guide ring press-fitting determination process, and proceeds to step S4. This guide ring press-determination process determines based whether the outer diameter a predetermined range of the annular split core 12 in the guide ring press-fitting load P _G. Details of the guide ring press-fitting determination process will be described later with reference to FIG.

In step S4, the controller 60, the guide ring press fit flag F _G is determined whether or not 1. Then, the flow proceeds to step S5 if the guide ring press fit flag F _G is 1, the process proceeds to step S10 if the guide ring press fit flag F _G is 0.

In step S5, the controller 60 performs a housing selection process, and proceeds to step S6. This housing determination process, based on the guide ring press-fitting load P _G described above, the inner diameter of two different housing 31a, selects one of 31b. Details of the housing selection process will be described later with reference to FIG.

  In step S6, the controller 60 press-fits the annular split core 12 into the housing 31 selected in the housing selection process in step S5, and proceeds to step S7.

In step S7, the controller 60 performs housing press-fitting determination processing, and proceeds to step S8. This housing press-fit determination process, an annular split core 12 on the basis of the housing press-fit load P _H when pressed into the housing 31, and determines whether a problem arises in the stator 51 manufactured. Details of the housing press-fitting determination processing will be described later with reference to FIG.

In step S8, the controller 60 determines whether or not the housing press-fit flag F _H is 1. When the housing press-fit flag F _H is 1, the process proceeds to step S9. When the housing press-fit flag F _H is 0, the process proceeds to step S10.

  In step S9, the controller 60 discharges the stator core 51 manufactured by the split core press-fit portion 20 to the stator discharge portion 50 and ends the process.

  In Step S10, the controller 60 discharges the annular split core 12 from Step S4 or the stator 51 from Step 8 as an NG product to an NG product discharge unit (not shown) and ends the process.

  FIG. 6 is a flowchart showing a control routine of the guide ring press-fitting determination process.

In step S31, the controller 60 detects the guide ring fit load P _G when press-fitting the annular split core 12 in the guide ring 22 by press-fitting load sensor 21c, the flow proceeds to step S32.

In step S32, the controller 60 is determined based on whether or not within a predetermined range which can be the outer diameter of the annular split core 12 is pressed into the annular split core 12 in the housing 31 to the guide ring press-fit load P _G To do. In other words, determination is made based on whether the guide ring fit load P _G is within a range of a predetermined value to the following equation (1).

Here, when the guide ring press-fitting load P _G satisfies the formula (1), it is determined that the outer diameter of the annular split core 12 can be reliably fixed to the housing 31 be within a predetermined range, the step S33 Move. On the other hand, if the press-fit load PG does not satisfy the formula (1), it is determined that the outer diameter of the annular split core 12 is too large or too small with respect to the housing inner diameter, and the process proceeds to step S34. The relationship between the guide ring press-fitting load and the outer diameter of the annular divided core refers to a map set in advance through experiments.

In step S33, the controller 60 determines that no problem to the outside diameter of the annular split core 12 (OK determination), and set the guide ring press fit flag F _G in 1, once the process exits. In contrast, in step S34, the controller 60 determines that there is a problem with the outer diameter of the annular split core 12 (NG determination), the guide ring press fit flag F _G is set to 0, once ended the process.

  FIG. 7 is a flowchart showing a control routine of the housing selection process.

In the housing selection process, in order to constant as possible a housing clamping force of the stator 51 to be produced, two different types of housing 31a of the inner diameter on the basis of the detected guide ring press fit load P _G at step S31, among 31b optimal A suitable housing 31 is selected.

In step S51, it determines on the basis of the guide ring fit load P _G is whether or not a predetermined value P ₃ following the next equation. The predetermined value P ₃ is a value larger than the first predetermined value P ₁ and smaller than the second predetermined value P ₂ .

Here, in the case of P _G ≦ P ₃ , it is determined that the outer diameter of the annular split core 12 varies toward the smaller diameter side, and the process proceeds to step S52. If P _G > P ₃ , it is determined that the outer diameter of the annular split core 12 varies toward the larger diameter side, and the process proceeds to step S53.

  In step S52, the controller 60 selects the housing 31a having a smaller inner diameter from the two housings 31 having different inner diameters, and temporarily exits the process.

  In step S53, the controller 60 selects the housing 31b having a larger housing inner diameter than the housing 31a from the two housings 31 having different inner diameters, and once exits the process.

  FIG. 8 is a flowchart showing a control routine of housing press-fitting determination processing.

In the housing press-fit determination process determines whether a problem arises in the stator 51 manufactured based on the housing press-fit load P _H when press-fitting the housing 31 two annular split cores 12 that have been selected by the housing selection process.

In step S71, the controller 60 detects the housing press-fit load P _H by press-fitting load sensor 21c, the flow proceeds to step S72.

At step S72, the controller 60, an annular split core 12 determines based on whether or not it is securely press-fitted into the housing 31 to the housing press-fit load P _H. In other words, determination is made based on whether the housing press-fit load P _H is within a predetermined value to the following equation (3).

Here, when the housing press-fit load P _H satisfies the expression (3), it is determined that the annular split core 12 is securely press-fitted into the housing 31, the flow proceeds to step S73.

On the other hand, when the press-fitting load P _H does not satisfy the expression (3) is an annular split cores 12 is determined not to be normally pressed into the housing 31, the flow proceeds to step S74. Here, as an example in which the annular split core 12 is not normally press-fitted into the housing 31, even if the outer diameter of the annular split core is within the reference, the inner diameter of the housing is too large and the housing tightening force is reduced. In some cases, the housing inner diameter is too small and the housing tightening force becomes too large.

In step S73, the controller 60 determines that there is no problem with the manufactured stator 51 (OK determination), sets the housing press-fit flag F _H to 1, and temporarily exits the process. In contrast, in step S74, the controller 60 determines that there is a problem with the manufactured stator 51 (NG determination), sets the housing press-fit flag F _H to 0, and once exits the process.

In this embodiment, as shown in FIGS. 5 to 8, as well as sorting the annular split core 12 based on the guide ring press-fitting load P _G, selects the housing 31 press-fitting the annular split core 12. Then, it is determined whether by press-fitting the housing 31 two annular split core 12 is selected, based on the housing press-fit load P _H at that time, an annular split core 12 is securely fixed to the housing 31.

  FIG. 9 is a diagram showing press-fit load characteristics when the annular split core 12 is press-fitted into the housing 31. FIG. 9A shows the press-fit load characteristic when the small-diameter housing 31a is selected, and FIG. 9B shows the press-fit load characteristic when the housing 31b having a larger diameter than the housing 31a is selected. 9A and 9B, the horizontal axis indicates the time after the annular split core 12 is press-fitted into the housing 23, and the vertical axis indicates the press-fitting load at that time. Here, the outer diameter of the annular split core 12 is different in each of the lines A, B, and C. The annular split core 12 indicated by the line A has the smallest outer diameter, and the annular split indicated by the line C. The outer diameter of the core 12 is the largest.

When the outer diameter of the annular split core 12 is small, the small-diameter housing 31a is selected, so that the housing press-fit loads P _HA and P _HB are within a predetermined range as shown by lines A and B in FIG. (Between the fourth predetermined value P ₄ and the fifth predetermined value P ₅ ). On the other hand, when the outer diameter of the annular split core 12 is large, the large-diameter housing 31b is selected, so that the housing press-fit loads P _HB and P _HC are indicated by lines B and C in FIG. 9B. Is within a predetermined range (between the fourth predetermined value P ₄ and the fifth predetermined value P ₅ ). Thus, even if the outer diameter of the annular split core 12 varies, the annular split core 12 is press-fitted into the housing 31 within a predetermined press-fit load range.

  As described above, the stator manufacturing apparatus 100 according to the first embodiment can obtain the following effects.

In the stator manufacturing apparatus 100, based on the guide ring press-fitting load P _G, the outer diameter of the annular split core 12 determines whether or not within the predetermined range (step S32), and press-fitting the annular split cores 12 The housing 31 is selected (step S51). Thereby, even if the outer diameter of the annular split core 12 varies, the housing fastening force can be stabilized, and the annular split core 12 can be reliably fixed to the housing 31.

Further, it is determined in the stator manufacturing apparatus 100, press-fitting the housing 31 two annular split core 12 is selected, whether or not there is abnormality in the stator 51 manufactured based on the housing press-fit load P _H (step S72). As a result, it is possible to determine the abnormality of the annular stator 51 due to variations in the housing inner diameter.

  Furthermore, in the stator manufacturing apparatus 100, the press-fitting device 21, the annular split core 12, the guide ring 22, the housing 31 and the like are arranged concentrically so that the press-fitting load measurement and the stator production are performed integrally. It is possible to reduce the cycle time when manufacturing the stator.

(Second Embodiment)
FIG. 10 is a diagram illustrating a second embodiment of the stator manufacturing apparatus.

  The configuration of the stator manufacturing apparatus 200 is substantially the same as that of the first embodiment, but a part of the configuration of the split core press-fitting portion 220 is different. That is, three types of guide rings 222 having different inner diameters are provided, and the differences will be mainly described below.

  As shown in FIG. 10, the stator manufacturing apparatus 200 includes three types of guide rings 222, a large-diameter guide ring 222A, an intermediate-diameter guide ring 222B, and a small-diameter guide ring 222C having different inner diameters.

  In the stator manufacturing apparatus 200, first, the annular split core 212 is press-fitted into the large-diameter guide ring 222A. Here, if the outer diameter of the annular split core 212 is too small with respect to the inner diameter of the large guide ring 222A, the guide ring press-fit load cannot be detected. Therefore, the annular split core 212 is based on the guide ring press-fit load. It is impossible to determine whether or not it can be securely fixed to the housing. Therefore, in such a case, the medium diameter guide ring 222B is supplied to the lower side of the large diameter guide ring 222A. Then, the guide ring press-fit load when the annular split core 212 is press-fitted into the medium-diameter guide ring 222B can be detected, and the annular split core 212 can be securely fixed to the housing based on the guide ring press-fit load. Determine whether or not.

  When the outer diameter of the annular split core 212 is too small with respect to the inner diameter of the medium diameter guide ring 222B, the small diameter guide ring 222C is supplied to the lower side of the medium diameter guide ring 222B, and the small diameter guide ring 222C has a circular shape. It is determined whether or not the annular split core 212 can be securely fixed to the housing based on the guide ring press-fit load when the annular split core 212 is press-fitted.

  Thus, in the stator manufacturing apparatus 200 of the second embodiment, the annular split core 212 is first press-fitted into the large-diameter guide ring 222A having a large inner diameter, and then the medium-diameter guide ring 222B having a small inner diameter and a small-diameter as necessary. The annular split core 212 is press-fitted into the guide ring 222C, and then the press-fitting load is detected.

  The inner diameters of the three types of guide rings 222A, 222B, and 222C described above are set as shown in FIG.

  FIG. 11 is a diagram illustrating the relationship between the guide ring inner diameter and the guide ring press-fit load. The horizontal axis indicates the guide ring inner diameter, and the vertical axis indicates the guide ring press-fit load. Line A, line B, line C, and line D shown in FIG. 11 indicate the guide ring press-fit load characteristics of the annular split core 212 having different outer diameters. The outer diameter of the annular split core 212 indicated by line A is the smallest, and the outer diameter of the annular split core 212 indicated by line D is the largest.

In the second embodiment, as shown in FIG. 11, the inner diameter of the large-diameter guide ring 222A is R _3, the inner diameter of the middle diameter guide ring 222B is R _2, the inner diameter of the small-diameter guide ring 222C is set to R ₁ Yes. If the guide ring press-fit load exceeds P _Gmax , the annular split core 212 may be broken at the time of press fit. Therefore, in the large-diameter guide ring 222A, the ring shown by the line C or D at the guide ring press-fit load P _Gmax or less. A guide ring press-fit load in the split core 212 is detected. Further, the medium diameter guide ring 222B detects the guide ring press-fit load in the annular divided core 212 indicated by the line C or the line B. Further, the small-diameter guide ring 222C detects a guide ring press-fit load in the annular split core 212 indicated by the line B or the line A. As described above, since the guide ring press-fit load is detected by the three types of guide rings 222A, 222B, and 222C having different inner diameters, the variation in the outer diameter of the annular split core 212 as shown by the line A to the line D is first. Even if larger than one embodiment (see FIG. 3), it is determined whether or not the outer diameter of the annular split core 212 is within a predetermined range based on the guide ring press-fit load detected by each guide ring 222A, 222B, 222C. be able to.

  In the stator manufacturing apparatus 200 configured as described above, the control performed by the controller 260 at the time of stator manufacture is substantially the same as that in the first embodiment. Therefore, the control of the guide ring press-fitting determination process different from that in the first embodiment is illustrated in FIG. Will be described with reference to FIG.

  FIG. 12 is a flowchart showing a control routine of the guide ring press-fitting determination process performed by the controller 260.

In step S301, the controller 260 detects the guide ring fit load P _GA when press-fitting the annular split core 212 into the large-diameter guide ring 222A by press-fitting load sensor 221c, moves to step S302.

In step S302, the controller 260 determines whether or not the outer diameter of the annular split core 212 is within a predetermined range in which the annular split core 212 can be press-fitted into the housing 231 based on the guide ring press-fit load _PGA. To do. That is, it is determined based on the following equation (4) whether or not the guide ring press-fit load _PGA is within a predetermined value range.

Here, when the guide ring press-fit load _PGA satisfies the expression (4), it is determined that the outer diameter of the annular split core 212 is within a predetermined range and can be reliably fixed to the housing 231, and the process proceeds to step S303. Move. On the other hand, when the guide ring press-fit load P _GA > P ₇ , it is determined that the outer diameter of the annular split core 212 is too large, and the process proceeds to step S310. If the guide ring press-fit load P _GA <P ₆ , it is determined that the outer diameter of the annular split core 212 cannot be determined by the large-diameter guide ring 222A, and the process proceeds to step S304.

  In step S304, the controller 260 supplies the medium diameter guide ring 222B, presses the annular split core 212 into the medium diameter guide ring 222B, and proceeds to step S305.

In step S305, the controller 260 detects the guide ring fit load P _GB when press-fitting the annular split core 212 in intermediate diameter guide ring 222B by press-fitting load sensor 221c, moves to step S306.

In step S306, the controller 260 determines whether or not the outer diameter of the annular split core 212 is within a predetermined range in which the annular split core 212 can be press-fitted into the housing 231 based on the guide ring press-fit load _PGB. To do. That is, it is determined based on the following formula (5) whether or not the guide ring press-fit load _PGB is within a predetermined value range.

Here, when the guide ring press-fit load _PGB satisfies the expression (5), it is determined that the outer diameter of the annular split core 212 is within a predetermined range and can be reliably fixed to the housing 231, and the process proceeds to step S303. Move. On the other hand, when the guide ring press-fit load P _GB > P ₉ , it is determined that the outer diameter of the annular split core 212 is too large, and the process proceeds to step S310. If the guide ring press-fit load P _GB <P ₈ , the medium diameter guide ring 222B determines that the outer diameter of the annular split core 212 cannot be determined, and the process proceeds to step S307.

  In step S307, the controller 260 supplies the small-diameter guide ring 222C, presses the annular split core 212 into the small-diameter guide ring 222C, and proceeds to step S308.

In step S308, the controller 260 detects the guide ring fit load P _GC when the press-fitting an annular split core 212 to the small-diameter guide ring 222C by press-fitting load sensor 221c, the flow proceeds to step S309.

In step S309, the controller 260 determines whether or not the outer diameter of the annular split core 212 is within a predetermined range in which the annular split core 212 can be press-fitted into the housing 231 based on the guide ring press-fit load _PGC. To do. That is, it is determined based on the following formula (6) whether or not the guide ring press-fit load P _GC is within a predetermined value range.

Here, when the guide ring press-fit load P _GC satisfies the expression (6), it is determined that the outer diameter of the annular split core 212 is within a predetermined range and can be reliably fixed to the housing 231, and the process proceeds to step S303. Move. On the other hand, if the guide ring press-fit load P _GC does not satisfy the expression (6), it is determined that the annular split core 212 cannot be press-fitted into the housing 231 and the process proceeds to step S310.

In step S303, the controller 260 determines that no problem to the outside diameter of the annular split core 212 (OK determination), left once the process by setting the guide ring press fit flag F _G to 1. In contrast, in step S310, the controller 260 determines that there is a problem with the outer diameter of the annular split core 212 (NG determination), the guide ring press fit flag F _G is left once the process is set to 0.

As described above, the stator manufacturing apparatus 200 according to the second embodiment uses the guide ring press-fit loads P _GA , P _GB , and P _GC when the annular split core 212 is press-fitted into the three types of guide rings 222A, 222B, and 222C. Thus, it is determined whether or not the annular split core 212 can be surely press-fitted into the housing 231. Also in the second embodiment, the detected guide ring press-fitting load P _GA, P _GB, selecting the optimum housing 31 of the two types of housings 31a, 31b on the basis of the P _GC.

  As described above, the stator manufacturing apparatus 200 of the second embodiment can obtain the following effects.

According to the stator manufacturing apparatus 200, since the three types of guide rings 222A, 222B, and 222C having different inner diameters are provided, the guide ring press-fitting load even if the variation in the outer diameter of the annular split core 212 is larger than that in the first embodiment. P _GA, can determine whether there is a problem with the outer diameter of the annular split core 212 based P _GB, the P _GC, it is possible to reliably press-fitted an annular split core 212 by the housing 231.

In addition, the annular split core 212 is first press-fitted into the large-diameter guide ring 222A, and then the annular split core 212 is press-fitted into the guide ring 222 having a small inner diameter as necessary. Even if the split core 212 is press-fitted into the guide ring 222A, it is possible to suppress the press-fit load from _exceeding P _Gmax and the annular split core 212 from being broken.

  It is obvious that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea.

  For example, in the first and second embodiments, the hydraulic presses 21 and 221 are used for press-fitting the annular split cores 12 and 212, but an electric press driven by voltage is used instead of the hydraulic presses 21a and 221a. May be. When the electric press is used in this way, the press-fitting load at the time of the annular split core press-fitting can be calculated based on the driving voltage or the like, so that the press-fitting load sensors 21c and 221c can be omitted.

  In the first embodiment and the second embodiment, two types of housings 31a and 31b having different inner diameters are selected based on the guide ring press-fit load. However, three or more types of housings having different inner diameters are provided. Also good. In this case, an optimal housing can be selected from three or more types of housings by increasing the number of predetermined values in step S51 of FIG.

  Furthermore, in the second embodiment, there are three types of guide rings 222, but more guide rings may be provided in consideration of the range of variation of the annular split core 212.

It is a figure which shows the whole structure of 1st Embodiment of a stator manufacturing apparatus. It is a figure which shows a guide ring press-fit load. It is a figure which shows a guide ring press-fit load when an annular division | segmentation core is press-fitted in a guide ring. It is a figure which shows a housing press-fit load. It is a flowchart which shows the control routine which a controller performs. It is a flowchart which shows the control routine of a guide ring press injection determination process. It is a flowchart which shows the control routine of a housing selection process. It is a flowchart which shows the control routine of housing press-fit determination processing. It is a figure which shows the press-fit load when an annular division | segmentation core is press-fitted in a housing. It is a figure which shows 2nd Embodiment of a stator manufacturing apparatus. It is a figure which shows a guide ring press-fit load when an annular division | segmentation core is press-fitted in a guide ring. It is a flowchart which shows the control routine of the guide ring press-fit determination process of 2nd Embodiment. It is a figure which shows the outer-diameter measuring apparatus which measures the outer diameter of a cyclic | annular division | segmentation core.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,200 Stator manufacturing apparatus 10 Split core supply part 20 Split core press-fit part 30 Housing supply part 40 Housing stock part 50 Stator discharge part 11 Split core 12 Toroidal split cores 21 and 221 Press-fit apparatus (pressing means)
21c, 221c Press-fit load detection sensor (load detection means)
22 Guide ring 22a Tapered portion 22b Same diameter portion 222A Large diameter guide ring 222B Medium diameter guide ring 222C Small diameter guide ring 31b31 Housing 60, 260 Controller S3, S32 Outer diameter determination means S5, S51 Housing selection means S7, S72 Press fit determination means S302 , S306 Guide ring selection means

Claims (8)

A stator manufacturing apparatus for manufacturing a stator by fixing a split core arranged in an annular state to a housing,
A pressing means for pressing the annular split core in the axial direction thereof;
Load detecting means for detecting a load when pressing the split core in the annular state;
A guide ring for guiding the annular split core after passing through the housing to be pressed into the housing, while inserting the annular split core pressed by the pressing means;
An outer diameter determining means for determining whether or not an outer diameter of the annular split core is within a predetermined range based on a load when the annular split core is inserted into the guide ring;
A housing selection means for selecting a housing to be supplied to the guide ring based on the load when inserted when the outer diameter of the annular split core is within a predetermined range;
A stator manufacturing apparatus comprising: A press-fitting determining means for determining whether or not the annular split core is fixed to the housing based on a load when the annular split core is press-fitted into the selected housing;
The stator manufacturing apparatus according to claim 1. The pressing means, the annular split core, the guide ring, and the housing are arranged concentrically;
The stator manufacturing apparatus according to claim 1 or 2, characterized in that An inner diameter of the guide ring is smaller than an inner diameter of the housing;
The stator manufacturing apparatus according to any one of claims 1 to 3, wherein A guide for determining whether to press-fit the annular divided core into a small-diameter guide ring having an inner diameter smaller than that of the guide ring based on a load when the annular divided core is inserted into the guide ring. Comprising a ring selection means,
The stator manufacturing apparatus according to any one of claims 1 to 4, wherein A plurality of the small-diameter guide rings having different inner diameters are provided.
The stator manufacturing apparatus according to claim 5. A stator manufacturing method for manufacturing a stator by fixing a split core arranged in an annular shape to a housing,
A pressing step of pressing the annular split core in the axial direction;
A load detection step of detecting a load when pressing the split core in the annular state;
A guide step of inserting the annular split core pressed in the pressing step into the guide ring and guiding the annular split core after passing through the housing;
An outer diameter determination step for determining whether or not the outer diameter of the annular core is within a predetermined range based on a load when the annular core is inserted into the guide ring; and
A housing selection step of selecting a housing to be supplied to the guide ring based on the load when inserted when an outer diameter of the annular split core is within a predetermined range;
A stator manufacturing method comprising: A press-fitting determination step of determining whether or not the annular split core is fixed to the housing based on a load when the annular split core is press-fitted into the selected housing;
The stator manufacturing method according to claim 7.

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