SU746227A2 - Measuring apparatus for balancing machine tool - Google Patents

Description

(54) MEASURING DEVICE FOR BALANCING

MACHINE

one

The invention relates to a balancing technique and 6 automatic balancing machines can be used.

According to the main auth. No. 560150 is a known measuring device to a balancing machine that contains an imbalance sensor, a selective amplifier, whose input is connected to a sensor, a projection measuring unit of dist. Balance, a reference signal generator connected to an imbalance projection measuring unit, a phase shifter connected to a generator , sequentially connected to each other by a rectifier, switched on the output of the selective amplifier, a modulator controlled by the phase shifter, a filter, an adder with inputs connected to the selective amplifier filter, and the output 20 connected to unit measuring the projection imbalance.

The disadvantage of this device is that its design does not always ensure that the balance is found in a given correction zone with repeated balances, since the errors of measurement and correction are not proportional to the magnitude of the initial imbalance. For example, for small, 30

initial imbalances, the value of the generated correction signal is close to zero, and the balancing error can reach 40% of the error at the maximum initial imbalance. As a result, the cumulative residual imbalance (error during balancing plus correction signal) may fall out of the correction zone set for re-balancing, which reduces the accuracy and performance of the balancing.

The purpose of the invention is to improve the accuracy of balancing.

This goal is achieved in that the device is equipped with an adjustable direct current source, the control input of which is connected to the output of the rectifier, and the output to the input of the modulator.

EA drawing shows a block diagram of the device.

It contains an unbalance sensor 1, a selective amplifier 2, the input of which is connected to the sensor 1, an unbalance projection measuring unit, a Reference signal generator 4 connected to an unbalance projection measuring unit, a phase shifter 5 connected to a generator, connected in series to each other by a rectifier 6,

an amplifier 2 connected to the output, a modulator 7 controlled by a phase converter, a filter 8, an adder 9 with inputs connected to the selective amplifier 2 and a filter 8, and. with an output connected to the unbalance projection measurement unit 3. The device also contains an adjustable 10-current source, a control input

Circuit connected to the output of rec.

lb, and the exit - with. modulator input 7

The device works as follows.

The voltage of sensor 1, proportional to the imbalance, is filtered and amplified in the selective amplifier 2. The output signal of amplifier 2 is fed to one of the inputs of the adder 9 and the input to the rectifier 6, the output constant voltage of the switch is unbalanced; The output of the rectifier is a B connection from an adjustable source of 10 DC, the second pole

 ifbtoporu is connected to the input of the modulator 7. Thus, the input to the modulator 7 is a signal equal to the Cyvwe of two constant voltages - constant,

ys (nr 5keni amendment created by

source 10, and a voltage proportional to the magnitude of the dyssshansa removed from the rectifier 6.

The control voltage for the modulator 7 is removed from the output of the phase shifter 5. The phase of this voltage depends on the position of the fi ro phase rotor and is used to center it on the rebalancing zone.

Since the output of the modulator 7 is rectangular shaped, the filter 8 filters out the harmonics from the higher harmonics the output voltage of the modulator which is fed to another input of the adder 9, the output of which is connected to the unbalance projection measurement unit 3, the reference for which is the voltage stator generator 4 reference signals. According to measurements of block 3, the imbalances of the balancing rotor are corrected, the residual imbalance of which will always be in the rebalancing balance zone, which allows reducing the resulting imbalance to a predetermined value by the repeated balancing cycle.

Thus, due to the fact that a regulated DC source was introduced into the device, the balancing error was compensated, causing deviation of the residual unbalance from the repetition correction zone, the device performance was improved, and the accuracy and performance of the balancing were improved.

Claims (1)

Invention Formula The measuring device to the balancing machine according to autog.No. 560150 is characterized in that, in order to improve the accuracy of balancing, it is equipped with an adjustable direct current source, the control input of which is connected to the output of the rectifier and the output to the modulator input.