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Abstract:

The investigations into the hydromechaymponical bulge forming involved the use of copper tubes at the relative ratio s(0) / D = 0.04 (where so is the wall thickness and D is the tube diameter). The experimental results of bulge forming of axisymmetric components are presented. The paper gives the force waveforms and the pressure changes obtained at relative displacement Delta l / l(0) = 0.06 (where Delta l displacement, l(0) initial length of tube). Both the axial force and liquid pressure increased with an increase in the relative displacement Delta l / l(0). The maximum value of the force amounted to 83,69 kN and the highest value of the pressure was noted (60 MPa) at ratio Delta l / l(0) = 0.06. The analysis of wall thickness distribution in logitutudinal and cross sections hydromechanically bulged axisymmetric component at ratios s(0) / D = 0.04 and Delta l / l(0) = 0.06 was made. The technological parameters (liquid pressure, axial loading) were determined, which may provide guidelines when the method is implemented into production.

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Determine parameters hydromechanical bulge forming of axisymmetric components from copper tubes