RU2469260C1 - Active monitoring device of cylindrical surfaces - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: device includes spring-loaded measuring roller with revolution counter device of spring-loaded roller, which is attached to the main holder by means of a crosspiece. Counter output is connected to inputs of the first NOR element and univibrator and the first input of the second AND element. Output of turning angle adjustment sensor of spring-loaded measuring roller is connected to the second input of the first AND element, the output of which is connected to inverting input of binary counter, the output of which is connected to input of buffer memory register, the output of which is connected to address input of table-like calculator, the output of which is connected to input of digital indicator. Output of the first NOR element is connected to the first input of the first AND element. Output of univibrator is connected to input of the second NOR element and to permission input of recording of buffer memory register. Output of the second NOR element is connected to the second input of the second AND element, the output of which is connected to reset input of binary counter.

EFFECT: improving reliability of the device and monitoring accuracy of cylindrical surfaces during processing.

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Description

The invention relates to measuring technique and can be used in mechanical engineering for the active control of cylindrical surfaces, based on the method of running a measuring roller in a machining process directly at workplaces, for example, in the process of grinding crankshaft necks.

A device [1] is known that implements a method for measuring the diameters of parts with a rotating measuring roller, comprising a speed sensor for the part, a measuring roller associated with a rotation angle transducer, and a light-emitting oscilloscope.

The disadvantage of this device is the low accuracy of the measurement due to the slipping of the roller on the measured surface, since the roller transmits torque to the transducer, and this, in turn, causes the measuring roller to brake and slip on the surface of the measured part. In addition, it is practically impossible to mount the measuring roller so that the axis of rotation of the roller and the parts are parallel, and non-parallelism leads to additional significant slippage of the roller. Measurement of the temporal characteristics of pulses from the part speed sensor and the roller speed converter on the oscilloscope screen leads to significant errors in the measurement process, since it is impossible to visually accurately measure the variables used to calculate the product diameter.

Closest to the claimed invention is a device for measuring the diameters of products [2], containing a measuring roller with a speed sensor, and the roller is mounted by means of a plate on the holder. In addition, it contains a first pulse counter, a product speed sensor, a second and third pulse counters, a clock pulse generator, a buffer register, first and second triggers and a diameter calculator.

The disadvantage of this device is also the low accuracy of the measurement, since the measuring roller is kinematically connected with the transducer of the rotation angle and has one degree of freedom. Such a connection leads to an increase in the creep of the roller over the measured surface during transmission of torque to the transducer, which leads to a slowdown of the measuring roller. The absence of an additional degree of freedom of the measuring roller contributes to a decrease in the reliability and accuracy of the measurement, due to wear on the surface of the roller and the parallelism of the axis of rotation of the roller and the measured part.

EFFECT: increased reliability of the device and accuracy of control of cylindrical surfaces during processing.

The specified technical result is achieved in that the device for active control of the cylindrical surface of the product contains a pulse counter, a buffer memory register and a computer.

A feature of the proposed device is that the spring-loaded measuring roller is connected to the main holder by means of a (freely rotating in two planes) crosspiece, with a counter for the rotation speed of the spring-loaded measuring roller, with inputs of the first element "NOT", a single vibrator and the first input of the second element "AND", the output of the sensor for adjusting the angle of rotation of the spring-loaded measuring roller is connected to the second input of the first element "And", the output of which is connected to the counting input of the binary counter, the output which is connected to the input of the buffer register of the memory, the output of which is connected to the address input of the table computer, the output of which is connected to the input of the digital indicator, the output of the first element "NOT" is connected to the first input of the first element "AND", the output of the one-shot is connected to the input of the second element "NOT »And with the input permission recording buffer register memory; the output of the second element “NOT” is connected to the second input of the second element “AND”, the output of which is connected to the input of the binary counter zero.

The essence of the invention is illustrated by drawings, where figure 1 shows the mechanical part, figure 2 is electronic, and figure 3 shows time diagrams illustrating the operation of the electronic part of the device.

The mechanical part of the device contains a main holder 1, at one end of which a crosspiece 2 is fixed in bearings, to the free ends of which also a holder 3 is attached through bearings, at the other end of which a spring-loaded measuring roller 4 is placed. Closer to the circumference, the spring-loaded measuring roller 4 has a through hole 5, and on the holder 3 holes are placed on different sides (moreover, all three holes are at equal distances and at the same radius from the axis of rotation of the spring-loaded measuring Faces 4), the LED 6 and photodetector 7, 8 constituting the sensor spring loaded rotational speed of the measuring roller 4.

The electronic part of the device consists of a speed sensor 8 of the spring-loaded measuring roller, the output of which is connected to the inputs of the first element "NOT" 9 and the input of the one-shot 10, as well as to the first input of the second element "AND" 11. The output of the first element "NOT" 9 is connected to the first input of the first element "And" 12, to the second input of which is connected the output of the sensor 13 adjusting the angle of rotation of the spring-loaded measuring roller 4. The output of the first element "And" 12 is connected to the counting first input of the binary counter 14, the output of which is inen with the input of the memory buffer register 15, the output of which is connected to the address input of the table computer 16, the output of which, in turn, is connected to the input of the digital indicator 17. The output of the one-shot 10 is connected to the input of the second element "NOT" 18 and to the input for recording buffer memory 15. The output of the second element "NOT" 18 is connected to the second input of the second element "AND" 11, the output of which is connected to the second input of the binary counter 14.

The device operates as follows. A spring-loaded measuring roller 4 is pressed against the surface of the measured part. The crosspiece 2 gives the spring-loaded measuring roller 4 two additional degrees of freedom, due to which the roller 4 is able to roll along the measured surface in the smallest circle and takes a parallel position with the axis of the workpiece. When the spring-loaded measuring roller 4 rotates on the surface of the measured part, the signal from the LED 7 passes through the hole in the holder 3 at the moment this hole coincides with the hole in the spring-loaded measuring roller 4, also passes through the hole in the holder 3 (but from the opposite side) to the photodetector 6 which generates a signal A (figure 3). The LED 7 and the photodetector 6 form a speed sensor 8 of the spring-loaded measuring roller 4. Signal A from the output of the speed sensor 8 simultaneously triggers a single-shot 10, the output signal of which is fed to the input of the second element "NOT" 18, the output signal D from the first element is "NOT "9 enters the first input of the element" And "12, and the second input of the first element" And "receives a signal C from the sensor 13 adjusting the angle of rotation of the spring-loaded measuring roller 4, at the output of the first element" And "forms a signal E, which a reset input of the binary counter 14 and sets it into the state "0", the output of which counting pulses having the form F, are input to the buffer memory register 15.

The output pulse B of the one-shot 10 is fed to the write enable input of the buffer register 15 and allows the binary code to be copied from the binary counter 14 to the buffer memory 15, and the signal B has a duration of less than half the duration of the pulse A. The binary code from the output of the buffer register 15 to the address input of the tabular calculator 16, in the cells of which are stored the pre-calculated values of the diameters of the parts according to the formula [3]:

,

,

where D is the diameter of the measured part; d is the diameter of the measuring roller; k is the coefficient of proportionality; N is the number of measuring pulses for the measurement period, equal to one revolution of the spring-loaded measuring roller 4.

From the output of the tabular calculator 16, the data are fed to the input of a digital indicator 17, where the parameters of the measured part are displayed in digital form.

LITERATURE

1. A.S. No. 1404806, MKI G01B 7/12. The method of measuring the diameters of parts with a rotating measuring roller / V.Sh. Magdeev and V.A. Vorobev (USSR), publ. 06/23/1988, bull. Number 23.

2. A.S. No. 1298521, MKI G01B 7/12. Device for measuring product diameters / V.Sh. Magdeev and V.A. Vorobyov (USSR), publ. 03/23/1987, bull. No. 11.

3. A.S. No. 1404805, MKI G01B 7/12. A method of measuring the diameters of cylindrical products / Yu.V. Moiseev and V. A. Potseluev (USSR), publ. 06/23/1988, bull. Number 23

Claims (1)

A device for active monitoring of cylindrical surfaces, containing a pulse counter, a buffer register of memory and a computer, characterized in that it is equipped with a spring-loaded measuring roller connected to the main holder by means of a cross, with a speed counter of a spring-loaded measuring roller connected to the inputs of the first element "NOT" , single vibrator and the first input of the second element "And", the output of the sensor for adjusting the angle of rotation of the spring-loaded measuring roller is connected to the second input m of the first element "I", the output of which is connected to the counting input of the binary counter, the output of which is connected to the input of the buffer register of memory, the output of which is connected to the address input of the table computer, the output of which is connected to the input of the digital indicator, the output of the first element "NOT" is connected to the first input of the first element "AND", and the output of the one-shot is connected to the input of the second element "NOT" and with the input enable recording buffer register memory, the output of the second element "NOT" is connected to the second input of the second element "AND", the output which is connected to the zero input of the binary counter.

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