VSR equipment is produced early in the last century and developed a new method to eliminate stress. That is the workpiece at a periodic external force applied resonant exciter using resonance theory that the internal microscopic deformation of the workpiece, so that the residual stress is released, the residual stress has been eliminated or homogenized to obtain dimensional accuracy stability. VSR equipment: it is an eccentric weight exciter has with fixtures mounted on the workpiece and the workpiece pad (skids) and other flexible objects supported by the control box starter exciter and adjust its speed, so that a workpiece in a resonance state. Usually the workpiece by vibration for 30 minutes to reach the purpose of adjustment of residual stress. Visible, using VSR equipment to adjust the residual stress technique is very simple and feasible. VSR equipment has been able to partially replace the thermal aging, is widely used in practice, with some obvious feature of this technology has the advantage inseparable. 1, less applicability investment. 2, high efficiency, short production cycle. 3, easy to use. 4, save energy, reduce cost, no waste, waste gas and radiation pollution. 5, the mechanical properties improved significantly. ZS95 Cheap VSR device ● Manual quick sweep, manual aging acceleration, deceleration speed of any control by the operator. ● digital display, frequency aging, aging time can intuitively reflect ● circuit having a wide phase shift range, automatic voltage, over-current cut-off protection. ● This series is suitable for less stringent requirements for stress relief part of the aging process. ● simple, easy to use, and other series supporting the use of more affordable