SU1618996A1 - Sensor for measuring roughness and controlling working operation - Google Patents

Description

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(61) 1504485 (21) 4429615/28 (22) 05.24.88 (46) 01.01.91. Bul Ne 1

(71) Perm Polytechnic Institute

(72) V.A. Ivanov and M.A. Glikson (53) 531.717 (088.8)

(56) USSR Author's Certificate N 1504485, cl. G 01 B 5/28, 07.28.88

(54) SENSOR FOR MEASURING ROUGHNESS AND MANAGING THE PROCESS

(57) The invention relates to measurement technology and can be used to measure roughness in the processing of products on CNC machines in the adaptive control mode. The purpose of the invention is to improve the measurement accuracy by adjusting the frequency of contact of the measuring transducer with the part depending on the specified measurement interval, the average step of asperities and the actual movement speed of the measured surface. The sensor works as follows. When measured using the unit for determining the velocity, a signal is formed and fed to the input of the unit for determining the oscillation frequency, to another input of which the signal comes from the unit of measurement intervals. The output of the oscillating frequency detecting unit controls a signal generator that oscillates the transducer. Roughness information is displayed on the counting unit 1 or

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The invention relates to the measurement technique and is an improvement of the invention according to the author. St. No. 1504485.

The aim of the invention is to improve the measurement accuracy.

The drawing shows a sensor circuit for measuring roughness and controlling the treatment process.

The sensor contains a measuring transducer 1, which interacts with the measured part 2, a signal generator 3 that drives the transducer 1 into oscillatory motion, an oscillation frequency detection unit 4, a unit 5 for determining the velocity of movement of the measured surface of the component 2, a measurement interval setting unit 6 and a recording-recording block 7. Roughness measurements are made

at certain intervals AS within the limits of step S of the asperities of the surface of the part 2. The step size S and the number of Z intervals are set at the inputs S, Z of the unit 6 intervals, made in the form of a voltage motor. Block 4 determines the frequency of oscillations by the formula

f -rU, rfle v is the speed of movement of the measured surface of the part 2 Block 4 can be made in the form of a voltage divider whose output signal is proportional to the signals generated at the outputs of blocks 5 and 6.

The sensor works as follows. In the initial state, the inputs S. Z of the setter 6 are set a priori.

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The average values of the average step and the number of measurement intervals.

When measured using block 5, a signal is generated that is proportional to the speed of movement of the surface of part 2 relative to converter 1, which is fed to the input of block 4, to another input of which a signal comes from block 6, proportional to the AS interval. At the output of B yuke 4, a signal is generated is determined by the values of average step S, velocity v and the number Z of measurement intervals. The output of block 4 controls the generator of 3 signals, which results in oscillatory motion

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raster 1. Roughness information is displayed on the reading unit 7.

Claims (1)

DETAILED DESCRIPTION A sensor for measuring roughness and controlling a machining process according to ed. St. No. 1504485, characterized in that, in order to improve measurement accuracy, it is equipped with an oscillation frequency determining unit connected to a signal generator, a measuring unit for determining the speed of movement of the measured surface and a unit for measuring intervals, the outputs of which are connected to the input of the oscillation frequency determining unit.