JP2853129B2 - Unbalance correction method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unbalance correcting method suitable for use in correcting an unbalance of a rotating body such as a rotor of a motor.

[Related Art] For example, when correcting imbalance of a fan motor, conventionally, a heavy part is cut or a putty is manually or manually attached to a light part.

However, the above-described cutting correction causes a decrease in motor characteristics when applied to a rotor of a motor, for example. Further, since the cutting chips adhere to the magnet, it is very difficult to treat the cutting chips.

In addition, the manual or manual putty correction method has the problem that the work efficiency is extremely poor. In addition, since the control of the added amount depends on a human can, the tact time per work is long and inefficient. Met.

[Problems to be Solved by the Invention] The present invention solves the problems of the above-described conventional unbalance correction method, and a correction that can reliably correct the unbalance by simply adding a weight to a correction portion that is simple and has a small space. It is intended to provide a way.

[Means for Solving the Problems] In order to solve the above problems, the present invention employs the following configuration.

That is, the unbalance correction method according to the present invention is a method of correcting the unbalance of the work based on the measurement result after rotating the work having the cylindrical portion and measuring the unbalance,
An amount of putty corresponding to the amount of unbalance is supplied to the inside of the cylinder of the work and to the unbalance correction position, and the work is rotated again to attach the putty to the correction position by centrifugal force.

[Operation] After a putty corresponding to the amount of correction is supplied to a correction portion (a portion having a small weight) of the work, the work is rotated and adhered to a predetermined position of the work by centrifugal force.
The adhesion by the centrifugal force can be performed using rotation for correction check.

[Embodiment] An embodiment shown in the drawings will be described below.

The imbalance correcting device 1 includes a rotary table 2, and the rotary table is provided with work holding devices 3 at a plurality of positions (three in the illustrated example) along the circumference thereof. Above the turntable 2, three work stations A, B, and C are provided along the circumferential direction.

The work holding device 3 includes a support shaft 6 supported by a bearing body 5 so as to be vertically movable. A vacuum suction plate 9 and support protrusions 10,. I have. The vacuum suction disk 9 is connected to a vacuum device 12 by an air passage 11 passing through the core of the support shaft 6. Support shaft 6
A lifting cylinder 14 is provided at the lower end of the support shaft 6, and the support shaft 6 is moved up and down by expansion and contraction of this cylinder.
The table 7 of the support shaft 6 is provided with a guide shaft 15 that extends downward through a guide hole provided in the rotary table 2 to prevent the support shaft 6 from rotating freely.

Among the three work stations, A is a station for performing unbalance measurement and putting putty, and supports a substrate 22 with leaf springs 21 and 21 on the lower surface side of a top plate 20 fixed to the machine frame, and a stator 23 Is attached. The stator 23 is a work rotating device in which a shaft hole 24 in which a center axis of a work is fitted is bored in a core portion, and a rotary magnetic core that rotates by input from an AC power supply 25 is provided inside. I have. The stator 23 is adapted to be fitted with a work, and can be replaced with another one in a one-touch manner according to the size of the work. A vibration detector for detecting vibration of the substrate 22 is provided on a side portion of the substrate 22 so as to measure the unbalance of the work.

The work station B is a work positioning station.
And the chuck device 31 are attached. Chuck device 31
A three-jaw collet chuck 33 that is opened and closed by a chuck cylinder 32 is supported by a rotating body 35, and the rotating body and the servomotor 30 are connected by a timing belt 37. The chuck IC 31 has a Hall IC mounting plate.
A hall IC 38 is attached to a lower end of the mounting hole 39. The Hall IC mounting plate 39 can also be replaced with one touch according to the size of the work.

Work station C is a putty correction station,
A base 40, a putty tank 41, and a gear pump 42 are attached to the top plate 20 to form a putty supply device. A support 45 is provided on the base 40 so as to be movable in the arrow X direction, and a slide unit 47 is attached to the support. A nozzle support 49 is attached to the slide unit 47 so as to be able to slide up and down, and a nozzle 50 with a valve is attached thereto. The nozzle 50 is connected to the gear pump 42 by a flexible pipe. The horizontal position of the nozzle can be adjusted in accordance with the size of the work by manually moving the support 45 horizontally.

The work stations A, B, and C are provided at intervals of 60 degrees as shown in FIG. 4. By rotating the turntable 2 by 60 degrees, the work can be sequentially positioned at each station. I can do it.

As shown in FIG. 5, the work 60 is a fan motor component in which blades 62,... Are integrally provided on the outer surface of a cylindrical body 61 having a bottom plate, and projects upward from the center of the body 61. A central shaft 63 is provided, and a magnet 64 is provided on the inner wall surface.
Is provided. The stator 61 is provided inside the body 61.
23 is fitted by magnetic force.

Next, the operation of this device will be described. First, the work is aligned and attached to the work holding device 3 of the rotary table. When the vacuum suction disk 9 is evacuated, the work 60 is firmly held by the work holding device 3. Next, the elevating cylinder 14 is extended, and the body 61 of the work 60 is fitted to the stator 23. At this time, the center axis 63 of the work is
Fit into 24. Stop the evacuation of the suction disk 9 and set the cylinder
14 is contracted to lower the holding device 3. Here, when the magnetic core of the stator 23 is energized, the work rotates together with the rotation of the magnetic core. The unbalance amount and the correction position are measured by the vibration during the rotation. After the measurement is completed, the support shaft 6 is raised again to suck the work 60, and then lowered again. After that, rotate the rotary table 2 by 60 degrees, and finish the work
Send 60 to station B.

At the work station B, the holding device 3 is raised, the collet chuck 33 is used to hold the center axis 63 of the work, and the vacuum suction is stopped and the holding device is lowered. Thereafter, the servo motor 30 is rotated based on the contents of the memory of the control device (not shown) and the signal from the Hall IC to position the work to be corrected. When the positioning is completed, the holding device is raised to suck the work, and the collet chuck 33 is opened to lower the work. Thereafter, the worktable is sent to the work station C by rotating the turntable 2 by 60 degrees.

In the work station C, the gear pump 42 and the valve are operated to supply the putty 65 in the putty tank 41 from the nozzle 50 to the work correction position by a predetermined amount. At this time, nozzle 50
Descends from the upper standby position into the body of the work, discharges the putty, and then rises again. The work itself does not rise. Thereafter, the rotary table 2 is rotated by 60 degrees and the work on which the putty is placed is sent to the original work station A.

At the work station A, the work is again fitted to the stator and rotated for the correction check, and the unbalance is measured.At this time, the putty 65 supplied to the work is pressed against the inner wall surface of the body 61 by centrifugal force, It adheres firmly as shown in FIG. Thereby, the unbalance of the work is corrected.

As the type of putty, a liquid putty such as a liquid composition of a hisphenol-based epoxy resin (main component) and an amine-based curing agent is used. In addition, a liquid epoxy resin, an ultraviolet curable resin, a light curable resin, a thermosetting resin, or the like can be used.

This imbalance correcting device can almost automatically perform the measurement of the imbalance, the positioning of the correction point, the supply of the putty for correction, and the attachment of the putty on the turntable in sequence almost automatically, so that it is extremely efficient and highly accurate. Balance correction can be performed. Since the putty is attached by centrifugal force using the rotation for checking the imbalance correction, a special operation for attaching the putty is not required, and the putty can be effectively attached to a narrow place.

Work is mounted on each of the three work holding devices of the rotary table 2, and when one work is located at the work station A, the other work is processed at the work stations B and C in parallel, which is more effective. It is.

In the illustrated example, the work (rotor) of the fan motor has been described as an example of the work, but it is apparent that the balance of other rotating bodies can be similarly corrected.

[Effects of the Invention] As is apparent from the above description, the unbalance correction method according to the present invention is excellent in that the unbalance correction of the rotating body can be performed efficiently and with high accuracy.

[Brief description of the drawings]

FIGS. 1 (a), 2 and 3 are front views of respective work stations showing an embodiment of the present invention, and FIG. 1 (b).
FIG. 4 is a side view of a main part, FIG. 4 is a plan view of a rotary table, FIG.
The figure is a sectional view of the work, and FIGS. 6 (a) and 6 (b) are a front view and a partial plan view of the work. DESCRIPTION OF SYMBOLS 1 ... Unbalance correction device, 2 ... Rotary table 3 ... Work holding device, 23 ... Stator 27 ... Vibration detector, 30 ... Servo motor 41 ... Putty tank, 42 ... Gear pump 50 ... Nozzle, 60 ... Work, 65 ... Putty

Claims (1)

(57) [Claims] 1. A method for measuring an unbalance by rotating a work having a cylindrical portion and correcting the unbalance of the work based on a result of the measurement, wherein putty having an amount corresponding to the unbalance amount is placed inside the cylinder of the work. An unbalance correction method, comprising supplying the putty to the correction position by supplying the material to the correction position and rotating the workpiece again by centrifugal force.