JPH0610272Y2 - Dynamic balance tester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a dynamic balance tester, and more particularly to a tester capable of performing surface runout measurement as well as dynamic balance test and unbalance correction.

[Prior Art] Fans for industrial air conditioners and the like are required to have a particularly long life. Therefore, the measurement accuracy in a dynamic balance test is also required to be higher than that of a consumer fan. Therefore, in the dynamic balance test of the industrial fan, first, the shake measurement on the fan boss surface is performed, and the dynamic balance test and the unbalance correction are performed on those which are determined to be acceptable in this measurement.

[Problems to be Solved by the Invention] As described above, in the dynamic balance measurement of the industrial fan, the surface runout measurement is performed prior to the dynamic balance measurement. The test is carried out by mounting it on a machine, and those that pass this test are then set on a dynamic balance tester for measurement and correction. In the dynamic balance measurement of an industrial fan, it is divided into two steps in this way, and
Since the measurement and correction are performed by two separate devices, the work must be set between both devices,
There is a problem that the work of transporting the work is required and the measurement work efficiency is reduced.

Therefore, an object of the present invention is to provide a dynamic balance tester capable of efficiently performing all the processing steps when measuring the dynamic balance of an industrial fan.

[Means for Solving Problems] The present invention adopts the following configuration in order to solve the above problems.

That is, the dynamic balance tester according to the present invention rotates the mounted work, and in the dynamic balance tester which measures the discontinuity of the work, the mounted work is rotated during the test to reduce the surface runout. It is characterized in that a surface wobbling measuring means for measurement is additionally provided, and whether or not a dynamic balance test can be performed is determined based on the surface wobbling measurement result.

[Operation] First, the surface wobbling measuring means measures the surface wobbling of the work,
It is determined whether the dynamic balance test can be performed based on the surface runout measurement result, and only for the work that has passed this surface runout test,
The dynamic balance test is continued with the initial setting.

[Embodiment] FIGS. 1 and 2 are a front view and a side view showing a configuration of an embodiment of the present invention. The dynamic balance testing machine 1 includes a balancer main body 2 for performing a dynamic balance test, a rotating means such as a servo motor (not shown), etc. built in the balancer main body 2, and a balancer base 3 having operation switches arranged above the main body 2. Is installed. The balancer base 3 is formed with a work mounting portion 6 connected to the rotating shaft of the rotating means, and a work 7 such as a fan to be measured is mounted and attached to the rotating shaft by a screw tightening adapter 8. A safety cover 10 is provided around the work to be attached. Further, a measuring device 5 for measuring the unbalance amount and angular position of the work is also installed on the balancer base 3. A control device 14 for controlling the driving of the rotating means and the operation of the measuring device is installed on the side surface of the balancer body 2. Further, the surface wobbling measuring device 11 for measuring the wobbling of the boss surface of the work 7 with respect to the work 7 set in the work mounting portion 6 includes an indicator 12 having an indicator probe 12a and a probe 12a of the indicator 12 for the work 7 And an elevating device 13 for elevating and lowering to make contact with the measurement surface.

The measurement signals of the surface wobbling measuring device 11 and the measuring device 5 for measuring the amount of unbalance and the angle are transmitted to the arithmetic and control unit 15 composed of a CPU by a data communication line and processed there. The result of the arithmetic processing is printed by the printer 16.

FIG. 3 is a block diagram showing the configuration of each of the above-mentioned parts. A supplementary explanation of the above-mentioned configuration will provide a DC servomotor.
The rotation drive of 17 is controlled by a signal from the control device 14, and the unbalance amount and angle of the workpiece during the dynamic balance test are detected by the unbalance detector 20 and the phase detector 21, and the detection signal is the measuring device. It is input to the arithmetic and control unit 15 via 5. The arithmetic and control unit 15 inputs / outputs a signal from the control unit 14 and also outputs a drive control signal to the lifting / lowering device 13 in the surface wobbling measurement device 11.

A measurement procedure in the dynamic balance testing machine 1 configured as described above will be described according to the automatic cycle chart shown in FIG.

First, the work 7 is attached by the screw tightening adapter 8 to the mounting portion 6
And attach the safety cover 10. After mounting the work, when the start switch is turned on, a signal for changing the work is input to the arithmetic and control unit 15 and the surface runout measurement is started. The indicator 12 of the surface wobbling measuring device 11 is lowered to bring the probe 12a into contact with the work 7. After the indicator data is cleared, the motor 17 is rotated (for example, 15 rpm), the minimum hold value is read into the arithmetic and control unit 15 after about 5 seconds, the indicator data is cleared after reading, and the maximum hold value is continued after about 5 seconds. Stop the motor by reading the value,
Raise the indicator 12.

The work pass / fail judgment is performed on the surface wobbling measurement 11, and if the work is not passed, the fact is printed out from the printer 16 and the measurement cycle is ended.

On the other hand, with respect to the work judged to be acceptable, the motor is rotated (for example, 1000 rpm) while being continuously set, and the measurement is performed. The signals from the detectors 20 and 21 are input to the arithmetic and control unit 15 via the measuring device 5, and the unbalanced data is read and arithmetically processed to detect the unbalanced amount and the angular position. The measurement result is printed out and a pass / fail judgment is made. The measurement cycle ends when a pass judgment is made, and the cycle is once stopped when a pass judgment is made.

For the work judged to be unacceptable, the safety cover 10 is removed, and the work is corrected based on the displayed unbalance amount and angular position. After the correction is completed, the safety cover 10 is reattached and the unbalanced measurement is performed again. After that, the measurement and correction cycle is performed until the acceptance judgment is made.

FIG. 5 is a time chart showing the processing timing of the automatic cycle, and shows that one processing cycle is performed in 29 seconds.

As described above, the surface runout measuring apparatus is mounted in the apparatus of the embodiment, and the surface runout test performed prior to the dynamic balance test of the industrial fan or the like can be performed in the same tester. Therefore, it is not necessary to change the work after setting the work, and the work that has passed the surface deflection measurement can be continuously subjected to the dynamic balance test, and the measurement work can be efficiently performed.

The correction performed after the unbalance test can be performed manually, and when an automatic correction device is provided, it can be fully automated in the above processing cycle.

[Effects of the Invention] As is clear from the above description, according to the dynamic balance tester of the present invention, the surface runout measurement is performed on a workpiece such as an industrial fan that must be subjected to the surface runout measurement before the unbalance measurement. Now, it is possible to efficiently perform a series of processing steps of unbalance measurement and unbalance correction.

[Brief description of drawings]

FIG. 1 is a front view showing the structure of an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a block diagram showing the same structure.
FIG. 4 is a cycle chart showing an automatic cycle, and FIG. 5 is a time chart showing operation timing. 2 ... Balancer body, 5 ... Measuring device 6 ... Work mounting part, 7 ... Work 11 ... Surface runout measuring device 12 ... Indicator, 13 ... Lifting device

Claims (1)

[Scope of utility model registration request] 1. In a dynamic balance test for rotating an attached work and measuring the unbalance of the work, a measuring means for rotating the attached work to measure the surface runout is attached. A dynamic balance testing machine, characterized in that a determination is made as to whether or not a dynamic balance test can be performed based on the result of surface wobbling measurement.