JP2989065B2 - Rotational body imbalance correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for correcting unbalance of a rotating body, and more particularly to a rotating apparatus for correcting unbalance of a rotating body having a plurality of teeth on its outer peripheral surface by cutting the outer peripheral surface of the teeth. The present invention relates to a body imbalance correcting device.

[0002]

2. Description of the Related Art Imbalance correction of a rotating body includes correction of static and dynamic imbalances, and there are a method of adding a weight to a corrected position and a method of shaving. For example, to correct the unbalance of the rotor of a motor, an outer peripheral surface of a tooth is cut by a disk cutter as disclosed in Japanese Patent Application Laid-Open No. 1-17428.

In the conventional unbalance correcting apparatus for a rotor as described above, for example, as shown in FIG. 8, each of the cutting edges of two disk cutters 52 provided coaxially on one rotating shaft 51 is used. Some of them are installed so as to face the respective outer peripheral surfaces of the teeth 53a adjacent to each other corresponding to the corrected position of the rotor 53. In this device, when an unbalance amount M expressed as a vector from the axis of the rotor 53 in the direction shown in the drawing is detected, each of the minutes passing through the midpoint between the adjacent teeth 53a in two arbitrary directions. Force M1 ・ M2
In order to make corrections according to the respective component forces M1 and M2, the rotating shaft 51 is rotated by a motor (not shown) and displaced radially inward relative to the rotor 53 by a predetermined amount. The adjacent teeth 53a corresponding to the component forces M1 and M2 are cut.

However, in the above-described correction device, the cutting operation by the disk cutter 52 must be performed for each of the component forces M1 and M2, that is, two times. The time required for the unbalance correction work is long. Therefore, there is a problem that it is difficult to shorten the unbalance correction process when shortening the tact time in the case where the rotor 53 is produced in a running operation. In addition, by using independent two-axis cutters, the correction operation can be completed by one cutting operation, but it is difficult to install the two-axis cutter in a cutting machine for a small motor rotor.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, a main object of the present invention is to provide a rotating body having a plurality of teeth, which can reduce the time required for correcting the imbalance. An object of the present invention is to provide a balance correcting device.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, a method of correcting an unbalance of a rotating body having a plurality of teeth on an outer peripheral surface by cutting the outer peripheral surface of the teeth. A body unbalance correction device, wherein adjacent ones corresponding to the correction positions of the plurality of teeth can be simultaneously cut in accordance with respective component forces passing through the adjacent teeth of the unbalanced vector. A pair of cutters arranged at a predetermined distance from each other in a plane perpendicular to the axis of the rotating body, and a cutter for relatively displacing the pair of cutters in the radial direction with respect to the rotating body. Displacement means;
The rotating body said pair of cutters, around the intersection of the tangent with each other through the cutting position of the tilting front <br/> in each outer peripheral surface of the adjacent teeth of the rotating body a plane orthogonal to the said axis And a tilting means for tilting the rotating body relative to the rotating body.

[0007]

In this way, by displacing the pair of cutters relatively in the radial direction of the rotating body by the cutter displacing means, it is possible to simultaneously cut adjacent ones of the plurality of teeth of the rotating body. with relatively tilted around the intersection of the tangent with each other through the cutting position before tilting of each outer peripheral surface of the adjacent teeth of the plane and there are rotating member perpendicular to the axis with respect to the rotating body by a cutter tilting means By doing so, it is possible to make each cutting depth independently variable. Therefore, the unbalance vector directed from the axis of the rotating body toward a certain direction outward in the radial direction is decomposed into two component forces passing through the outer peripheral surface portions of the adjacent teeth sandwiching the vector, so that each component force can be obtained. Accordingly, even if the cutting amount for each tooth is different from each other, it can be removed by one cutting operation by adjusting the displacement amount and the tilt angle of the cutter.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of the present invention. FIG. 1 is a front view showing a cutting machine of an unbalance correcting device to which the present invention is applied. This cutting machine measures rotation unbalance of a rotor 1 of a motor.
The correction of the unbalance is carried out with a negative balance by cutting the outer peripheral surface of the teeth 1a of the rotor 1 as teeth provided on the rotating body.

The above-mentioned correction work will be described with reference to FIG. 2 which shows a flow of the operation of the unbalance correction table. In the rotor manufacturing process, the rotor 1 conveyed between the respective stages by the conveyor 2 is picked up. First, in step ST1, the rotational unbalance of the rotor 1 is measured, and the next step S1 is performed.
In T2, the positioning of the cutting position with respect to the front side in the axial direction of the rotor 1 is performed. Then, in step ST3, cutting is performed by the cutting machine shown in FIG. 1 according to the correction amount. In the next step ST4, a cutting position is positioned with respect to the rear side in the axial direction of the rotor 1, and in step ST5, cutting is performed by a cutting machine similar to the above in accordance with the correction amount. Then, in step ST6, the unbalance after the correction is measured, and if it is within the acceptable range, it is returned to the conveyor 2;

The above-mentioned cutting machine has a pair of disk cutters 4a and 4b driven via a belt 3 by a motor (not shown) disposed below in FIG. The two disk cutters 4a and 4b are coaxially fixed to a bearing block 6 fixed on a base frame 5 of a cutting machine at one axial end of a cutter shaft 7 rotatably supported at an intermediate portion. I have. A belt pulley 7a is fixed to the other end of the cutter shaft 7 in the axial direction, and the belt 3 is wound around the pulley 7a.

The base frame 5 is provided with a clamp mechanism 8 for holding and holding the rotor 1 in the radial direction. The rotor 1 is held by the clamp mechanism 8 so as to be positioned above the disk cutters 4a and 4b and to make their axes orthogonal to each other when viewed from above.

As shown in FIG. 3, an L-shaped member 10 is pivotally supported on a fixed wall 9 erected on the base frame 5 so as to be swingable about an axis along the axis of the rotor 1. On the jaw of the L-shaped member 10, two columns 11, which are opposed to each other with the rotor 1 interposed therebetween, are erected, and the rods extend in the direction in which the columns 11 are erected. An air cylinder 12 is mounted so as to face upward so as to be able to reciprocate.

An intermediate portion between a pair of large link members 13a and 13b which can be tilted in a direction sandwiching the outer peripheral surface of the rotor 1 from the side is pivotally supported at each free end of the column 11. A pair of small link members 14 whose base ends are pivotally supported at the base ends of the large link members 13a and 13b via a clevis member fixed to the front end of the rod of the air cylinder 12.
Are freely rotatably connected to each other. At the upper free ends of the large link members 13a and 13b, large link members 13a
Clamp claw 15a having an arc-shaped concave surface so that rotor 1 can be clamped from the side in response to the tilting movement of 13b.
15b are provided. The left clamp claw 15a in FIG. 1 is supported via a slide rail 16 so as to be slidable in a direction along the axis of the rotor 1, and the right clamp claw 15b is rotated around a pivot axis along the axis of the rotor 1. It is supported via a pivot pin 17 so that it can rotate.

The air cylinder 1 of the clamp mechanism 8 described above
By reciprocating the two rods, the rotor 1 can be firmly held between the clamp claws 15a and 15b by the link mechanism. Further, the L-shaped member 10 supporting the clamp mechanism 8 is pivotally supported by the fixed wall 9, and the swing range may be 10 degrees on both sides from the perpendicular (see the imaginary line in FIG. 1). The tilting drive mechanism described later tilts the lens to a predetermined angle and holds it at that position.

The above-mentioned disk cutters 4a and 4b are appropriately driven in the vertical direction by a cutter displacement mechanism 18 as displacement means. Cutter displacement mechanism 18
Has a slide base 18a provided with three sliders that can slide on two parallel rails 19 laid on the base frame 5, as shown in FIG. An arm 20 whose base end is pivotally supported by a portal column 18b erected above is provided. The bearing block 6 is supported at an intermediate portion of the arm 20, and an engaging pin 21 is provided at a free end of the arm 20 so as to project in a direction parallel to the axis of the pivot shaft at the base end. I have. A thin cylinder 22 is fixed on the slide base 18a, and a C-shaped engagement groove 23a of an engagement block 23 fixed to a distal end portion of the rod 22a and an engagement pin 21 engage with each other. I have.

A curved block 24 having a curved surface protruding upward is fixed to the upper surface of the free end of the arm 20, and is erected on the base frame 5 as shown in FIG. The horizontal portion 25a of the inverted L-shaped fixing member 25 is configured to face above the curved block 24, and the wedge-shaped tapered block 26 is sandwiched between the lower surface of the horizontal portion and the curved block 24. doing. Accordingly, the reciprocating motion of the rod 22a of the thin cylinder causes the arm 20 to swing vertically about the pivot of the portal column 18b as a fulcrum, but the upper limit thereof is regulated by the taper block 26. By this upper limit, the cutting depth of the disk cutters 4a and 4b into the rotor 1 is determined.

A slide rail 27 is fixed to the upper surface of a member erected on the slide base 18a so as to face the fixed member 25 so as to extend along the longitudinal direction of the arm 20. , A slide block 28 is supported reciprocally. As best shown in FIG. 5, the free end of the bracket whose base end is fixed to the slide block 28 is
Is supported.

The slide block 28 is composed of a pulse motor 2 supported by a member provided with a slide rail 27.
9 is driven so as to slide on the slide rail 27 via the rack and pinion 30. In addition, a pair of position sensors 31 for determining the slide range limit of the slide block 28 are provided at appropriate positions.

In the cutter displacement mechanism 18 configured as described above, the taper block 26 is rotated in the direction of arrow C in FIG. 4 by rotating the pulse motor 29 forward and backward by a predetermined amount based on a signal from a control unit (not shown). Can be appropriately displaced. The tapered block 26 is formed with a tapered surface that abuts against the curved surface block 24, and the stroke until the curved surface block 24 abuts against the tapered block 26 changes according to the displacement. Therefore,
By controlling the amount of displacement or position of the taper block 26 by controlling the amount of rotation of the pulse motor 29, the disk cutter 4
The cut depth of a.4b can be easily adjusted.

At one end of the base 18a in the sliding direction,
As shown in FIG. 1, the distal end of a rod of a cylinder 32 fixed on the base frame 5 is connected, and by driving the cylinder 32, the base 18a is slid so that the disk cutters 4a and 4b are 1 can be displaced along the axial direction. Slide base 1
On the base frame 5 at the other end in the sliding direction 8a,
A stopper member 34 detachably supported by a clamp lever 33 is provided so that the slide base 18a can be positioned in the sliding direction.
Therefore, by appropriately replacing the stopper members 34 having different lengths, the cutting positions of the various motors having different axial lengths with respect to the rotors can be easily adjusted, and two cutting machines of the same design can be used. Can be used for front side cutting and rear side cutting.

[0021] By tilting kinematic mechanism Ru is tilted to the pivoted L-shaped member 10 to the fixed wall 9 as described above to the pivot around
The tilting means of the present application for relatively tilting the cutter is configured.
Has been established. Hereinafter, to indicate with reference to FIG. A pivot 35 projects from the upper part of the L-shaped member 10 so as to penetrate the fixed wall 9, and a bearing block 36 fixed to the fixed wall 9.
The pivot 35 is supported via a ball bearing mounted on the shaft. The axial direction of the pivot 35 is along the axis of the rotor 1, and the L-shaped member 10 is tilted on a plane orthogonal to the axis of the rotor 1. An overrun sensor 37 for detecting an overrun of the tilt angle of the L-shaped member 10 is provided on the protruding end side of the pivot 35.

A gear 38, in which two spur gears are combined to eliminate backlash, is coaxially fixed to the base end of the pivot 35. The bearing block 3 of the fixed wall 9
A speed reducer 39 is fixed below 6, and an idle gear 40 fixed to an output shaft of the speed reducer 39 meshes with the gear 38. A driven pulley 41 for a toothed belt is fixed to the input shaft of the speed reducer 39, and a driven pulley 43 fixed to a motor shaft of a pulse motor 42 fixed to the base frame 5 and the driven pulley 41 described above. A toothed belt 44 is wound around. A rotation sensor 45 is provided at the rear end of the motor shaft of the pulse motor 42.

According to the tilting mechanism constructed as described above, the L-shaped member 10 rotates around the axis of the pivot 35, and the center of rotation P is the main part enlarged view of FIG. As shown in FIG. 2, the rotor 1 is located at a predetermined distance below the axis of the rotor 1. Therefore, in the present cutting machine, when the L-shaped member 10 is located at the hanging position indicated by the solid line in FIG. 1, by moving the disk cutters 4 a and 4 b up and down by the cutter displacement mechanism 18, Rotor 1
The outer peripheral surface of each tooth 1a can be evenly cut, and the L-shaped member 10 can be tilted to the left and right at a predetermined angle, so that the outer peripheral surface of each tooth 1a relative to the cutting edge of each of the disk cutters 4a and 4b can be cut. Because the position changes, each tooth 1a by the disk cutters 4a and 4b
Can be arbitrarily changed.

Next, the procedure for cutting the rotor 1 by the present cutting machine will be described below with reference to FIG. FIG. 7 shows a state in which the L-shaped member 10 is tilted at a predetermined angle θ from the hanging position, and the disk cutter 4a is located at a position slightly separated from the rotor 1 before the cutting operation.・ 4
b is waiting. At this time, the thin cylinder 22 of the cutter displacement mechanism 18 is in a state where the rod is contracted, the arm 20 is inclined downward, and the curved block 2
4 and the tapered block 26 are separated from each other.

FIG. 7 shows the magnitude and direction of the unbalance measured during the measurement of the unbalance in the previous step.
If the vector M is represented by
The components are divided into component forces m1 and m2 that pass radially outward from the rotor shaft of each adjacent tooth 1a. Then, the rotor 1 is positioned so that the teeth 1a through which the component forces m1 and m2 pass correspond to the cutting edges of the disk cutters 4a and 4b, and the clamp mechanism 8 is held so as to maintain the state.
Temporarily fixed.

As shown in FIG. 7, since the magnitudes of the component force m1 and the component force m2 are different from each other, the cutting depth calculated based on a preset calculation value in order to cut the corresponding amount. , The tilt angle θ of the rotor 1 and the cutting amount h in the direction of arrow B are determined. The tilt angle θ and the cut amount h can be obtained by the following equations.

Each disk cutter 4a, 4b in FIG.
Each tangent to each corresponding tooth 1a (L1 · L in FIG. 7)
Assuming that the distance between the intersection P of 2) and the contact point between each of the tangent lines L1 and L2 and each of the teeth 1a is r, and the cutting depth of each of the teeth 1a is t1 and t2 as shown in the figure, θ = (T1−t2) / 2rh = (t1 + t2) / 2, and the tilt angle θ and the cutting amount h can be obtained.

Based on the values obtained by the above equations,
The tilt angle θ of the L-shaped member 10 and the disk cutter 4a
By determining the displacement (idle distance + h) of 4b and performing a cutting operation in accordance therewith, it is possible to correct the balance amount according to the unbalance M by one cutting.

After the unbalance correction with respect to the front side in the axial direction of the rotor 1 has been performed in this way, as described above, the rear step in the axial direction of the rotor 1 is performed in a later step using the same cutting machine and the same control. Make an imbalance correction for the side.

In this embodiment, the disk cutter 4a
4b is displaced in the vertical direction to incline the rotor 1, but the present invention is not limited thereto, and the other party may be moved, and a combination thereof can be arbitrarily set. Further, the present invention is not limited to the rotor of the motor, and can be applied to a spline-shaped rotor or an imbalance correction of a rotating body whose outer peripheral surface is divided into a plurality of parts by slots.

[0031]

As described above, according to the present invention, when the imbalance of a rotating body having a plurality of teeth is corrected by a pair of cutters, it is difficult to perform cutting by cutting adjacent teeth evenly. In the correction of the balance, it was necessary to perform two cuts. However, the rotator and the cutter were tangent to each other through the cutting position before tilting on each outer peripheral surface of the adjacent teeth of the rotator. By tilting about the intersection of the center, the cutting amount for adjacent teeth can be adjusted, so that the unbalance existing in an arbitrary direction is divided into the adjacent teeth, and the cutting amount according to each component force is obtained. By adjusting the relative tilt and the cutting amount in the radial direction of the rotating body as described above, the cutting operation for correcting the imbalance can be completed by one cutting operation. Therefore, the time required for the work of the unbalance correction is shortened, and the manufacturing process of the motor and the like can be shortened.
The effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a front view showing a cutting machine of an imbalance correcting apparatus to which the present invention is applied.

FIG. 2 is a diagram showing a flow of work of an imbalance correction table.

FIG. 3 is a plan view seen from line III in FIG. 1;

4 is an enlarged view of an essential part taken along line IV in FIG. 3;

FIG. 5 is a partially enlarged view taken on line VV of FIG. 3;

FIG. 6 is a partially broken arrow view taken along line VI-VI of FIG. 3;

FIG. 7 is an explanatory view showing a cutting procedure based on the present invention.

FIG. 8 is an explanatory view showing a conventional cutting procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 1a Teeth 2 Conveyor 3 Belt 4a ・ 4b Disk cutter 5 Base frame 6 Bearing block 7 Cutter shaft 7a Belt pulley 8 Clamp mechanism 9 Fixed wall 10 L-shaped member 11 Support column 12 Air cylinder 13a ・ 13b Large link member 14 Small Link member 15a / 15b Clamp claw 16 Slide rail 17 Pivot pin 18 Cutter displacement mechanism 18a Slide base 18b Gate type support 19 Rail 20 Arm 21 Engagement pin 22 Cylinder 22a Rod 23 Engagement block 23a Engagement groove 24 Curved surface block 25 Fixed Member 25a Horizontal portion 26 Taper block 27 Slide rail 28 Slide block 29 Pulse motor 30 Rack / pinion 31 Position sensor 32 Cylinder 33 Clamp lever 34 Stopper member 35 Axis 36 Bearing block 37 Overrun sensor 38 Gear 39 Reducer 40 Idle gear 41 Follower pulley 42 Pulse motor 43 Drive pulley 44 Toothed belt 45 Rotation sensor 51 Rotation axis 52 Disk cutter 53 Rotor 53a Teeth

Claims (1)

(57) [Claims] 1. An apparatus for correcting an unbalance of a rotating body having a plurality of teeth on an outer peripheral surface by cutting an outer peripheral surface portion of the teeth, the unbalance correcting apparatus comprising: A predetermined distance from each other in a plane orthogonal to the axis of the rotating body so that adjacent ones corresponding to the correction position can be simultaneously cut in accordance with each component force passing through the adjacent tooth of the unbalanced vector. A pair of cutters, a cutter displacing means for relatively displacing the pair of cutters in the radial direction with respect to the rotating body, and a pair of cutters that are orthogonal to the axis. Inside and on each outer peripheral surface of the adjacent teeth of the rotating body .
Kicking unbalance correction device of a rotating body; and a tilt means for relatively tilting with respect to the rotary member about the intersection of the tangent with each other through the cutting position before tilting.