JP2019037021A - Balance correction device and method of rotor - Google Patents

Abstract

To cut a plurality of places in a short time upon balance correction by cutting a part of a rotor such as a motor and a fan.SOLUTION: A core 11 is cut and balance is corrected in accordance with a correction amount obtained by measurement of a balance measuring device. Two sets of cutter blades 51 and 52 are used for cutting and driving is performed by individual rotary shafts 53 and 54. The cutter blades 51 and 52 are arranged on both sides of an extension line 19 of one diameter line of a rotor 1, and they are set to be symmetrical shapes. Thus, two correction positions V1 and V2 can simultaneously be cut and balance can be corrected in a short time.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating body balance correcting apparatus and method for cutting and correcting a rotating body such as a rotor of a commutator motor to correct the balance of the rotating body.

  If there is a deviation in the balance of a rotating body such as an armature or a fan of a motor, uneven rotation occurs, causing vibration or failure. Therefore, conventionally, the balance is measured by a balance measuring device, and the balance is adjusted within an allowable value by scraping a part of the rotating body in accordance with the vector amount obtained as a result of the measurement in the balance correcting device. A fix has been made to enter. Such balance correction by cutting is disclosed in Patent Documents 1 and 2, for example.

  The above-mentioned case is to form a V-cut groove in the core (teeth), and FIG. 4 shows a conventional adjustment method using an R cutter (also referred to as a drum cutter) as a cutter blade. FIG. 4 shows a rotor (armature) 1 of a motor with a 12-pole commutator. The twelve slots 13 are formed in the core 11, and a coil 15 is wound around a tooth 14 cut out from the slot 13. In the example of FIG. 4, an example in which the core 11 to be cut is two places is shown.

  First, as shown in FIG. 4A, the cutter blade 22 rotated by the rotary shaft 21 is pressed to the first correction position V1 as shown by an arrow 23, and the axial direction (in FIG. 4). Moved vertically). The amount to be pressed, that is, the depth to be scraped off, and the moving range, that is, the length to scrape are determined according to a vector of the adjustment amount measured by the balance measuring device. A work presser 24 is provided at a position facing the cutter blade 22.

  When the correction of the first correction position V1 is completed in this way, the work holder 24 and the cutter blade 22 are released, and the core 11 (rotor (armature) 1) becomes 360 / as shown in FIG. As shown in FIG. 4C, the cutter blade 22 is pressed against the second correction position V2, and the work presser 24 is pressed against the opposite position. Such vector correction is usually performed at 1 to 4 locations, depending on the number of stations of the rotor (armature) 1 and the like.

  The cutter blade 22 is the R cutter (drum cutter), FIG. 5 (a) is a side view thereof, and FIG. 5 (b) is a front view thereof. The rotary shaft 21 is fixed to the cutter blade 22 as described above. The rotary shaft 21 has a notch 211 formed on the outer peripheral surface thereof to define the angle of attachment of the spindle to the chuck (clamper), or a flange 212 provided so that the amount of biting into the chuck (clamper) can be reduced. In other words, it is accurately positioned at the correction positions V1 and V2.

  The outer edge of the cutter blade 22 has a drum shape or a pincushion shape, and the side surface is formed in an arc (R) shape in a side view of FIG. Cutting edges 221 are formed on the outer circumferential surface of the arc at equal intervals in the circumferential direction (six locations in FIG. 5) and twisted (to draw a steep (deep angle) spiral). The cutting positions 221 are cut at the correction positions V1 and V2.

JP 2007-89254 A JP 2011-101444 A

  In the above-described prior art, the cutter blade 22 is sequentially applied to the two correction positions V1 and V2, so that for example, the core 11 (rotor (armature) 1 is 1.5 seconds for correcting the first position V1. ) It takes 0.5 seconds to rotate from the correction position V1 to V2 and 1.5 seconds to correct the second position V2, and a total of 3.5 seconds is required. is there.

  An object of the present invention is to provide a rotating body balance correcting apparatus and method that can be performed in a short time when performing balance adjustment by cutting a rotating body at a plurality of locations.

  According to another aspect of the present invention, there is provided a rotating body balance correcting apparatus, comprising: a rotating body balance correcting apparatus that cuts a part of the rotating body to correct the balance of the rotating body; Two cutter blades to be arranged, and a pair of rotating shafts that are individually provided on the two cutter blades and that rotate and drive each cutter blade against the rotating body according to the correction vector amount. It is characterized by being configured.

  The rotating body balance correcting method according to the present invention is the rotating body balance correcting method for correcting the balance of the rotating body by cutting a part of the rotating body. Are arranged on both sides of an extension line of the one-diameter line of the rotating body, and a displacement corresponding to the correction vector amount is given to the rotary shaft that rotationally drives each cutter blade. The cutting is performed.

  According to the above configuration, when correcting the balance of the rotating body by cutting a part of the rotating body, two sets of the cutter blade that performs the cutting and the rotary shaft that rotationally drives the cutter blade are provided. A cutter blade and a rotating shaft are provided on both sides of an extension line of one diameter line of the rotating body. Each cutter blade has a displacement, that is, a depth to be scraped off, and a moving range, that is, a length to be scraped, according to the correction vector amount, and performs cutting individually.

  Therefore, two correction positions can be cut simultaneously, and balance correction can be performed in a short time.

  Furthermore, in the balance correcting device for a rotating body according to the present invention, the cutter blades are formed in symmetrical shapes with respect to an extension line of one diameter line of the rotating body.

  According to said structure, although the said 2 sets of cutter blades may be a combination of different kinds like a V cutter and an R cutter, for example, with respect to the extension line of one diameter line of the said rotary body By making them symmetrical to each other, the way of cutting becomes equal.

  Therefore, for example, when three or more places are cut, the measurement result (vector amount) of the balance measuring device can be reflected by any cutter blade, and convenience can be improved.

  In the rotating body balance correcting device of the present invention, the cutter blade is an R cutter.

  According to the above configuration, the cutter blade includes a V cutter and the like, but the R cutter along the outer periphery of the rotating body cuts one core uniformly, so the cutting depth is suppressed, and the magnetic path And the influence on the air gap can be reduced.

  Furthermore, in the balance correcting device for a rotating body according to the present invention, the rotating body is a rotor of a commutator motor, and the blade width of the R cutter is the sum of the core (tooth) width and the slit width. It is characterized by being.

  Moreover, in the balance correction method of the rotary body of the present invention, the cutter blade is an R cutter, the rotary body is a rotor of a commutator motor, and the blade width of the R cutter is a core width and a slit width. It is the length of the sum of and.

  According to the above configuration, as described above, the R cutter cuts the core uniformly, so that the slit width of the cutter is not set to the core (teeth) width, but using the cutter. Set to the added length.

  Therefore, in the state where the core (teeth) and the center of the cutter blade coincide with each other, both ends in the circumferential direction of the cutter blade protrude by half of the slit width, and within the protruding range, the core (teeth) Even if the rotational position of) is shifted, cutting can be performed in the same manner. As a result, if the width is within half of the slit width, it can be corrected without any angular error.

  The rotating body balance correcting apparatus and method of the present invention, as described above, in performing the balance correction by cutting of the rotating body at a plurality of locations, the cutter blade for cutting and the rotary shaft for rotationally driving the cutter blade, Are provided on both sides of an extension line of one diameter line, and each cutter blade is individually cut according to the correction vector amount.

  Therefore, two correction positions can be cut simultaneously, and balance correction can be performed in a short time.

It is typical sectional drawing explaining the correction method in the balance correction apparatus which concerns on one Embodiment of this invention. It is a perspective view of the rotor of the motor with a commutator corrected with the said balance correction apparatus. It is a schematic diagram explaining the setting method of the blade width of a cutter blade. It is typical sectional drawing explaining the correction method in the balance correction apparatus of a prior art. It is a figure of the cutter blade used for the balance correction apparatus of FIG.

  FIG. 1 is a schematic cross-sectional view for explaining a correction method in a balance correction apparatus according to an embodiment of the present invention. The rotor 1 of the motor with a commutator that is corrected by the balance correcting device of the present embodiment is the same as FIG. 4, and FIG. 2 shows a perspective view after the adjustment. The parts corresponding to are assigned the same reference numerals, and the description thereof is omitted.

  In the example of FIG. 2, the balance of the rotor 1 is corrected by cutting with an R cutter as indicated by reference numerals 111 and 112 at the two poles of the 12-pole core 11 (tooth 14). . In the present embodiment, a part of the core 11 on the commutator 10 side is a cutting target, and the cutting part 111 is greatly cut compared to the cutting part 112. As described above, the amount of scraping is measured by the balance measuring apparatus in the previous process.

  Referring to FIG. 1, it should be noted that in the balance correcting device and the balance correcting method of the present embodiment, the balance of the rotor 1 that is a rotating body is corrected by cutting a part of the rotor 1. In this case, two sets of cutter blades 51 and 52 for performing the cutting and rotary shafts 53 and 54 for rotationally driving the cutter blades 51 and 52 are provided, and the cutter blades 51 and 52 and the rotary shafts 53 and 54 are connected to the rotor 1. Is provided on both sides of the extension line 19 of one diameter line. The two cutter blades 51 and 52 are provided with displacements indicated by reference numerals 55 and 56, that is, a depth D1 to be shaved off from the rotary shafts 53 and 54 in accordance with the correction vector amount obtained by the balance measuring device. , D2 and a moving range, that is, lengths L1 and L2 (see FIG. 2) to be shaved off are respectively determined, and cutting is performed individually. The rotary shafts 53 and 54 are rotationally driven by a spindle that chucks (clamps) the rotary shafts 53 and 54.

  Therefore, according to the balance correction apparatus and the balance correction method of the present embodiment, the two correction positions V1 and V2 can be cut simultaneously, and the balance correction can be performed in a short time. For example, in comparison with the example of FIG. 4, only the first 1.5 seconds of cutting may be performed, and the rotation of the core 11 (rotor (armature) 1) for 0.5 seconds or the second 1.5 seconds is performed. Cutting is unnecessary, and the cutting time can be reduced to 3/7.

  For example, when the three steps of measuring with the balance measuring device, correcting with the balance correcting device of the present embodiment, and measuring the result are continuously performed, the rotor 1 is specified in the balance measuring device. The work of accelerating to speed, measuring, and decelerating is required, for example, 1.9 seconds are required. Therefore, in this embodiment, since correction of two places is only 1.5 seconds, correction can be completed during the measurement.

  Here, the two sets of cutter blades 51 and 52 may be different types of combinations, for example, a V cutter and an R cutter, but in the balance correction device and the balance correction method of the present embodiment, The rotor 1 is formed in a symmetrical shape with respect to the extension line 19 of the one-diameter line. In the example of FIG. 1, it is an R cutter (a drum cutter). Thereby, for example, when three or more places are cut, the measurement result (vector amount) of the balance measuring device can be reflected by any of the cutter blades 51 and 52, and convenience can be improved.

  Moreover, since the cutter blades 51 and 52 are R cutters, the R cutter along the outer periphery of the rotor 1 cuts one core 11 uniformly, so that the cutting depths D1 and D2 are suppressed, The influence on the magnetic path and the air gap can be reduced.

  By the way, the cutter blade 22 shown in FIG. 5 described above is an R cutter, the diameters of both large-diameter end portions swelled from a large diameter to a large diameter are equal to each other. As shown in FIG. 1, 51 and 52 are formed in a substantially truncated cone shape in which the extension line 19 side of the one-diameter line facing each other has a small diameter and the opposite side has a large diameter. As a result, the two correction positions V1 and V2 can be cut uniformly.

  When the cutter blades 22 having the same diameter at both large diameter ends shown in FIG. 4 are used, when the two correction positions V1 and V2 are simultaneously cut as in this embodiment, the rotary shaft 21 is V-shaped. It is necessary to switch the tilt according to the diameter of the rotor 1. On the other hand, by using the substantially truncated cone shaped cutter blades 51 and 52 as in the present embodiment, it is only necessary to replace the cutter blades 51 and 52 according to the diameter of the rotor 1, and the rotation shaft 53. , 54 need only be arranged in a straight line at the initial position.

  Moreover, in FIG. 3, the schematic diagram explaining the setting method of the blade width W of the cutter blade 51 in this embodiment is shown. The same applies to the cutter blade 52, and a description thereof will be omitted. It should be noted that the rotor is the rotor 1 of the commutator motor, has the core 11 (tooth 14), and the R cutter uniformly cuts the core 11 (tooth 14). The width W of the cutter blade 51 is not set to the limit of the width W1 of the core 11 (tooth 14), but is set to the total length of the width W1 and the width W2 of the slit (13).

  Therefore, in the state where the center of the core 11 (tooth 14) and the cutter blade 51 coincide with each other, both end portions in the circumferential direction of the cutter blade 51 protrude by 1/2 of the slit width, and within the protruding range. Even if the rotational position of the core 11 (tooth 14) is shifted, cutting can be performed in the same manner. In FIG. 3, the state where the relative position between the cutter blade 51 and the core 11 (tooth 14) is shifted most is indicated by reference numerals 51 a and 51 b, and if the relative position is within these ranges, uncut parts are generated. There is nothing. As a result, if the width is within half of the slit width, it can be corrected without any angular error.

1 Rotor of motor with commutator (armature)
DESCRIPTION OF SYMBOLS 10 Commutator 11 Core 111,112 Cutting part 13 for balance adjustment Slot 14 Teeth 15 Coil 19 Extension line of one diameter line Workpiece clamp 51,52 Cutter blade 53,54 Rotating shaft

Claims (6)

In the rotating body balance correcting device for cutting a part of the rotating body to correct the balance of the rotating body,
Two cutter blades arranged on both sides of an extension line of one diameter line of the rotating body;
Rotation characterized by comprising a pair of rotating shafts that are individually provided on the two cutter blades and that rotate and drive each cutter blade against the rotating body according to the correction vector amount. Body balance correction device.   The balance correcting device for a rotating body according to claim 1, wherein the cutter blades are formed symmetrically with respect to an extension line of one diameter line of the rotating body.   3. The rotating body balance correcting device according to claim 1, wherein the cutter blade is an R cutter.   The balance of the rotating body according to claim 3, wherein the rotating body is a rotor of a commutator motor, and the blade width of the R cutter is a sum of a core width and a slit width. apparatus. In the method of correcting the balance of the rotating body, the balance of the rotating body is corrected by cutting a part of the rotating body.
Cutter blades that are rotationally driven by a rotating shaft for the cutting are disposed on both sides of an extension line of one diameter line of the rotating body,
A method of correcting a balance of a rotating body, wherein a displacement corresponding to a correction vector amount is given to each of the rotation shafts that rotationally drive each cutter blade to cause the cutter blade to perform the cutting.   The cutter blade is an R cutter, the rotating body is a rotor of a commutator motor, and the blade width of the R cutter is a sum of a core width and a slit width. The method for correcting balance of a rotating body according to claim 5.

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