ブルドン管の塑性加工

ブルドン管圧力計に関する研究(第3報)

抄録

To study the dynamic behavior of the Bourdon tube for bending is an important subject for making a better accuracy one, and also for the design of the good bender. In this paper, the plastic bending of flat-tube with thin thickness and flat-oval cross section are analyzed. For calculations of the stress and the strain, the Bourdon tube with idealized cross section is assumed, and to obtain the solutions, this idealized cross section is separated into two parallel parts. Considering boundary conditions, the solutions about the stress and the strain in plastic bending of the Bourdon tube are decided. For the calculations of the bending moment of it, the material with property of linear-incleasing work-hardening type is assumed, and the solutions by using plane strain theory are obtained. For n=1 (n, work-hardening coefficient), the numerical graphs using these solutions are drawn up. Next, the experimental values of the bending moments are compared with these graphs. From these results, the authors obtain the conclusions that representation of bending moment for idealized cross section can be applied sufficiently to the Bourdon tube with flat-oval cross section.