Abstract
This article reviews the design of thermal power units for performing thermal operations of hardening and tempering of non-rigid parts of the “shaft” type. The authors describe the thermal power treatmenttechnology, the residual deformation analysis and the optimal conditionsdefinition. The units operation principles and algorithms are given.
Highlights
The ever-growing requirements for the machines quality entail the increased requirements for the accuracy of non-rigid parts (NRP) and, for the creation of advanced technologies of their manufacturing
That is why in practice the issues of manufacturing non-rigid parts are solved by applying multicycleheat treatment and multipass turning process, by reducing the cutting modes and applying the additional manual finishing operations, which is uneconomical and inefficient.In addition, the accuracy and stability of the part shape depend on the technological process structure, taking into consideration the operations’ interconnections and technological heredity, which is transmitted by the workpiece material itself
The temperatures of the shaft workpiece heating and the frame cooling are selected based on the condition ofexceeding the yield limit during the simultaneous heating of the SW fixed in the frame
Summary
The ever-growing requirements for the machines quality entail the increased requirements for the accuracy of non-rigid parts (NRP) and, for the creation of advanced technologies of their manufacturing. In order to eliminate this disadvantage, we improved the thermal power treatment technology; the preliminary heating of the SW with the fixtures installed on it is carried out simultaneously with the frame cooling.
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