摘要
本文对相对法及绝对法测量弧齿锥齿轮的齿距误差的精度进行了分析与比较。相对法远不能满足弧齿锥齿轮高精度测量的要求。而绝对式半自动测齿仪和单啮仪,只能测量圆柱齿轮。研制的“光栅式齿距误差测量仪”,适用于弧齿锥齿轮的测量。本文论述了该仪器的工作原理,对仪器分度装置、锁相倍频器、乘Z计数器中的某些精度问题进行了分析,介绍了用简单计数电路实现在一定范围内各种齿数的测量,采用计数器代数运算电路计算△t_∑(△t_(∑i))、△t_p、△_xt。该仪器还适用于对圆柱齿轮、圆锥直齿轮、蜗轮等的测量。
In this paper, high precise measuring principle of the pitch error for spiral bevel gears and the new technique used in the instrument are described. The pitch error is an important item in gear accuracy. Most measurements ofthe pitch error are carried out by comparative measuring principle. As the compara-tive measurement is used for a spiral bevel gear, two feelers can not be set atthe same position in two adjacent corresponding flanks. However, because the pitcherrors at various position of the face width are not equal so that the pitch errorsin the gear can not be indicated truly by the measured data. The absolute measur-ing principle is employed in our instrument. A precise moire-fringe grating isused. The pitch error can be measured automatically. This instrument is suitable forbevel gears with various reference angle, cylinder gears with various profile (in-cluding shaving cutter, slotting tool) and index plates etc. δt_∑ is recorded on a pa-per chart. The δt_P and δ_xt are printed. A frequency multiplier with phase-locked loop is used to obtain 1000 frequen-cy multiplication for moire-fringe signal so that the quantizing error of the pulsecould be reduced. A 'multiply Z counter' is used. All kinds of tooth number canbe measured. The stepless multiplier which is made up of a 'multiply Z counter'and a 'phase-locked tracking frequence multiplier' may be used for other cases. Aspecial-purpose digital computer which is consisted of decade counters has been de-veloped.
出处
《仪器仪表学报》
EI
CAS
1981年第2期52-65,共14页
Chinese Journal of Scientific Instrument
