Justification of Force Parameters for Stabilization of Ring Blanks of Low Rigidity

Abstract

The necessity of stabilization of ring blanks of low rigidity is substantiated. For stabilization a 6-position loading scheme with uniformly distributed radial forces is proposed, with the possibility to transform into 3- and 2-position loading schemes. The stress state of the ring under loading by uniformly distributed radial forces is analyzed, and calculation dependences for determining the total stress at 6-, 3- and 2-position loading schemes are proposed. Calculation dependences are offered for determination of force parameters of the device with lever-joint mechanism for creation of stresses in the ring at the level of conditional yield strength. According to the proposed method of calculation of force parameters, an example of calculation is given for a ring made of 40ХМФА (40KhMFA) steel with an outside diameter of 392 mm. The developed recommendations can be used at creation of devices for stabilization and removal of residual stresses in ring blanks, which are necessary for manufacture of critical products in such areas as auto- and aircraft construction, precision engineering, military industry.

Keywords

• ring blank
• ring
• stress state
• stabilization
• radial force
• lever-joint mechanism