Research of reliability indicators for forming small-sized threads with taps
The article presents the results of studies of reliability indicators for thread forming by taps - machine-manual (cutting), plastic deforming and cutting-deforming. To study the failure rates of their functioning in the laboratory, a full factorial experiment was conducted, and the conditions for its planning were presented. The data obtained as a result of the research allowed us to identify the failure times for three types of taps. The results of statistical research of these tags are summarized in a table. Based on the results of calculations, graphs of the relative frequency distribution of time between taps failures were constructed for each of the variants. Among the most frequent causes of failures in the operation of machine-hand taps, there were breakdowns of the working part, and in plastic-deforming taps, the teeth of the fence section and transition teeth were painted. The cutting and deforming taps had failures in approximately equal proportions for both the first and second reasons, but they are characterized by higher reliability indicators.