SU574605A1

SU574605A1 - Device for measuring the kinematic error of toothed gearing

Info

Publication number: SU574605A1
Application number: SU7602365506A
Authority: SU
Inventors: Иван Александрович Шваб
Original assignee: Shvab Ivan A
Priority date: 1976-05-26
Filing date: 1976-05-26
Publication date: 1977-09-30

Description

1one

Изобретение относитс к области контрол изделий в машиностроении, а именно к устройствам дл ко«трол кинематической погрешности зубчатых передач.The invention relates to the field of inspection of products in mechanical engineering, namely, devices for controlling the kinematic error of gears.

Известно устройство дл контрол кинематической погрешности зубчатых передач, содержаш;ее фотоэлектрические датчики углов поворота, установленные на начальном и конечном звень х контролируемой передачи, фазометр, на вход которого подаютс сигналы датчиков, и регистрируюидий прибор. В этом устройстве кинематическую погрешность определ ют по фазовому сдвигу между импульсами , снимаемыми с фотоэлектрических датчиков.A device for monitoring the kinematic error of gears is known, comprising: its photoelectric sensors for steering angles installed at the initial and final links of the controlled transmission, a phase meter, to the input of which the signals of the sensors are supplied, and a recording device. In this device, the kinematic error is determined by the phase shift between pulses taken from the photoelectric sensors.

Однако така схема построени устройства не обеспечивает высокой мощности измерений . Объ сн етс это тем, что точность работы устройства в большой степени зависит как от точности изготовлени растровых решеток фотоэлектрических датчиков, так и от точности фазометра.However, such a device construction scheme does not provide high power measurements. This is explained by the fact that the accuracy of the device is largely dependent on both the accuracy of the manufacturing of the raster arrays of photoelectric sensors and the accuracy of the phase meter.

Наиболее близким решением из известных вл етс устройство дл измерени кинематической погрешности зубчатых передач, содержаш ,ее фотоэлектрические преобразователи начального и конечного звеньев контролируемой передачи с независимыми источниками излучени и фотоприемниками, электронный смеситель частот, электрически св занных с преобразователем начального звена , детектируюш,ий блок и регистрируюш,ий прибор. В этом устройстве кинематическую погрешность определ ют как разность между зарегистрированным числовым интервалом и его расчетным значением.The closest solution known is a device for measuring the kinematic error of gears containing, its initial and final photoelectric converters of controlled transmission with independent radiation sources and photodetectors, an electronic frequency mixer electrically connected to the initial level converter, detecting unit, and registering device In this device, the kinematic error is defined as the difference between the recorded numerical interval and its calculated value.

Недостатком указанного устройства вл етс низка точность измерени , обусловленна также погрешностью изготовлени фотоэлектрических датчиков, сигналы которых оказывают решающее значение на точность измерени .The disadvantage of this device is low measurement accuracy, also due to the error in the manufacture of photoelectric sensors, the signals of which have a decisive importance on the measurement accuracy.

Цель изобретени - повышение точности измерени .The purpose of the invention is to improve the measurement accuracy.

Указанна цель достигаетс том, ч го устройство снабжено генератором частоты, электрически св занным с электронным смесителем частот, а источник излучени фотоэлектрического преобразовател конечного звенаThis goal is achieved with a device equipped with a frequency generator electrically connected to an electronic frequency mixer, and a radiation source of a photovoltaic converter of the final link

электрически св зан через смеситель частот с фотоприемником преобразовател начального звена.electrically connected via a frequency mixer to the photodetector of the initial level converter.

На чертеже изображена блок-схема фотоэлектрического устройства, котора включаетThe drawing shows a block diagram of a photovoltaic device, which includes

в себ фотоэлектрические преобразователи начального 1 и конечного 2 звеньев контролируемой передачи 3, электронный смеситель частот 4 и св занный с ним генератор частоты 5, усилитель 6, детектирующий блок 7 иphotoelectric converters of initial 1 and final 2 controlled transmission units 3, an electronic frequency mixer 4 and a frequency generator 5 associated with it, an amplifier 6, a detection unit 7 and

Claims

a recording device 8. The photoelectric converter of the initial 1 link includes a radiation source 9 based on an incandescent lamp, an optical system 10, a circular 11 and a sector 12 raster lattice, the first of which is rigidly connected to the input shaft of the controlled transmission 3, the other is fixedly mounted on its case (not shown). The photodetector 13 is electrically connected to the 4 frequency electronic mixer, which in turn is connected to the frequency generator 5. The photoelectric converter of the final 2 link includes the same circular 14 and sector 15 raster grids, a radiation source 16 based on light-emitting diodes, an optical system 17 and a photo-receiver 18, the output signal of which is fed to the detecting unit 7, then to the recording device 8. The circular grating 14 is mounted on the output shaft of the transmission 3 and is mixed with respect to the same circular grating 11 mounted on the input shaft for half a step. Sector lattice 15 is installed on the transmission housing (not shown). The identity of the raster grids And and 14 and 12 and 15 photoelectric converters of the initial 1 and end / about 2 units improves the manufacturability of the measuring device and simplifies the control process. The proposed device works in the following way. When the controlled transmission 3 moves, the photoelectric converter of the initial 1 link at certain intervals determined by the pitch of the raster gratings 11 and 12 produces electrical impulses with a frequency / n (Hz), where Pn is the speed of the input shaft, in rpm; m is the number of grooves of the circular grating 11. These pulses go to one of the inputs of an electronic mixer of 4 frequencies, to the other input of which pulses come from a frequency generator 5, and the frequency of these pulses / g is set to (i + 1) times more or less than the frequency f , b where i is the gear ratio. Let / r / n (t + 1). In this case, the electronic mixer 4 selects a signal whose frequency is equal to the difference between the frequencies of the generator and the converter of the initial 1 link / k fn (t + l) - / n. that is, the photoelectric converter signal of the final link with frequency / to fni Since the raster grid 14 of the final 2 link is shifted by half a step with respect to the same grid 11 of the initial 1 link, in the absence of kinematic error, the luminous flux does not reach the photodetector 18, i.e. At the moment when the measuring junction of the gratings 14 and 1-b of the final 2 link can transmit the light flux, the pulses of the radiation source 16 are absent. When the kinematic error appears, the angular mixing of the raster grid 14 of the final 2 link with respect to the same grid 11 of the initial 1 link occurs and the luminous flux of the radiation source 16 modulated by frequency / k goes to the photodetector 18. The output variable signal of the photodetector 18 with a frequency controlled by a photoelectric converter of the initial 1 link and an amplitude controlled by the angular mixing, the circular gratings 11 and 14 of the final 2 and initial 1 links are fed to a detecting device 7, in which is allocated to a signal proportional to angular displacement of the circular arrays 11 and 14 m. e. a kinematic transmission error. Since the detecting device 7 selects only the envelope of the pulses, the distortion of their shape, duration and follow-up period does not affect the magnitude of the output signal and, thus, the errors of manufacturing raster gratings AND-12 and 14-15 do not affect the measurement accuracy. The use of a frequency generator in the proposed device simplifies the device and makes it universal, i.e., suitable for monitoring transmissions with any transmission ratio, and coupling the radiation source of the end-stage photoelectric converter with a radiation receiver of the same initial frequency converter allows eliminating the phase meter and increase the accuracy of measurement, since in this case the magnitude of the kinematic error is judged not by the phase shift between the initial transducer pulses and k transmission links, and according to the intensity of the light flux transmitted through the pupils of the raster gratings of the transducer of the final link. An apparatus for measuring the kinematic error of gears, comprising photoelectric transducers of the initial and final stages of controlled transmission with radiation sources and photo receivers, an electronic frequency mixer, a detecting unit and a recording device, characterized in that it is equipped with a frequency generator to improve measurement accuracy. electrically connected to an electronic frequency mixer, and the source of the photoelectric converter of the final link electrically connected via a frequency mixer to the photodetector of the initial level converter.