FIELD: shaping.
SUBSTANCE: group of inventions relates to a method for axial deformation of a fixed axisymmetric part and to a unit for implementation thereof. The method includes fixing the part at two ends in the vertical position, performing axial deformation with simultaneous non-contact temperature control of the workpiece using a temperature sensor in the form of a thermal imaging apparatus, and cooling. Axial deformation is performed by means of automatically controlled power electric hydraulic drives with simultaneous automatic temperature control using a temperature sensor in the form of a thermal imaging apparatus, wherein the transition of elastic deformation to plastic deformation is simultaneously controlled by controlling the transition of the negative temperature of the part to the positive temperature of the part, the uniformity of temperature is estimated along the length of the part, and the average value thereof is taken as the average initial temperature of the part, the rate of temperature increase is then controlled along the length of the part, wherein when focal heating areas and neck formation areas appear, air blowing is automatically activated in order to cool the neck formation areas to the initial average temperature, the control and deformation cycles are then repeated until reaching a temperature whereat the axial plastic deformation equals ε=0.8 to 1%, and when a constant temperature rate is reached along the length of the part and focal heating areas are absent along the length of the part, deformation is stopped, and the part is automatically cooled at a uniform rate to ambient temperature. The unit comprises an air cooling control circuit including an air pump, controlled throttle valves and injectors, a temperature control circuit including a converter and a temperature sensor connected thereto in series, and a power plastic deformation control circuit including two electric hydraulic drives with gripping mechanisms.
EFFECT: increase in the stability of the size and shape of long-length low-rigidity parts, elimination of technological heredity, and minimisation of plastic deformation of the finished product in the operating period.
2 cl, 2 dwg
