Statistical measurement of the total deviation of the pitch: including the average total deviation and total dispersion of the statistical measurement of the pitch. It can be decomposed into two parts: 1 statistical measurement of single pitch deviation; 2 statistical measurement of cumulative pitch deviation. The former includes statistical measurements of individual pitch average deviations and dispersions; the latter includes statistical measurements of cumulative pitch average deviations and dispersions.
Statistical measurement of tangential total deviation: including statistical measurement of tangential integrated mean total deviation and total dispersion. It can be decomposed into two parts: 1 statistical measurement of the fundamental frequency tangential comprehensive deviation; 2 statistical measurement of the tooth frequency tangential comprehensive deviation. The former includes statistical measurement of the fundamental tangential integrated mean deviation and dispersion; the latter includes statistical measurement of the tangential tangential integrated mean deviation and dispersion.
In order to facilitate process analysis and process error (or fault) diagnosis, the following gear statistical accuracy items can be established: (9) Statistical analysis of total tooth profile deviation: including statistical analysis of the average total deviation and total dispersion of the tooth profile. It can be decomposed into two parts: 1 statistical analysis of tooth profile slope deviation; 2 statistical analysis of tooth profile shape deviation. The former includes statistical analysis of the mean deviation and dispersion of the profile gradient; the latter includes statistical analysis of the mean deviation and dispersion of the tooth profile.
Statistical analysis of total spiral deviation: including statistical analysis of the average total deviation and total dispersion of the spiral. It can be decomposed into two parts: 1 statistical analysis of the spiral slope deviation; 2 statistical analysis of the spiral shape deviation. The former includes statistical analysis of the mean deviation and dispersion of the helix slope; the latter includes statistical analysis of the mean deviation and dispersion of the spiral shape.
Gear statistical accuracy project evaluation The gear statistical measurement error item is characterized by the results obtained by statistically measuring the gear deviation measured by the gear accuracy standard. The gear statistical analysis error item is to analyze the error item measurement result by spectrum analysis and eliminate After the influence of the processing factors independent of the frequency of the error item, the statistical results are used to process the results; the gear statistical design error item is defined by the gear accuracy standard and the error permit value range specified by the accuracy level of the error item, The error tolerance values ​​set by factors such as the specific processing method, the processing quality of the system, and the change in quality during processing are characterized.
1 represents the results that may be obtained after statistical analysis of the gears produced in a continuous sequence of a set gear machining process system. In the figure, Δ1 is the average deviation of the statistical accuracy items of one or a group of gears produced at time T1; δ1 is the deviation of the statistical accuracy items of one or a group of gears produced at time T1; σ1 is one produced at time T1 or The deviation of the statistical accuracy of a set of gears (ie, the root mean square deviation of the deviation), when the deviation is a normal distribution: δ1=±3σ1; Δ2 is the average of the statistical accuracy items of one or a group of gears produced at time T2 Deviation; δ2 is the deviation of the statistical accuracy of one or a group of gears produced at time T2; σ2 is the deviation of the statistical accuracy of one or a group of gears produced at time T2 (ie, the root mean square of the deviation) When the deviation is normal distribution: δ2=±3σ2; Δ1-2 is the average deviation of the statistical accuracy items of the gears produced in the [T1, T2] time interval; Δmax1-2 is produced in the [T1, T2] time interval The maximum deviation of the statistical accuracy of the gear; Δmin1-2 is the minimum deviation of the statistical accuracy of the gear produced during the [T1, T2] time interval; δ1-2 is the statistical accuracy of the gear produced during the [T1, T2] time interval Very poor deviation of the project ; σ 1-2 is the deviation of the statistical accuracy of the gears produced in the [T1, T2] time interval (ie, the root mean square deviation of the deviation), and the deviation is usually not normally distributed.
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