And in the definition of non-rotary pump, the valveless concept was thus generated.
This paper is aimed to investigate the process design and control method in cold rotary forging of parts with non-rotary upper and lower profiles.
The third one is that the metal flow and geometrical accuracy of the non-rotary upper profile of parts can be effectively controlled through optimizing the process parameters.
The results indicate that the desirable geometrical accuracy of the non-rotary upper profile of the gear part can be obtained, which verifies that the process design and control method presented in this paper is valid and cold rotary forging can thus be used to manufacture the parts with non-rotary upper and lower profiles.
It marked the birth of the first non-rotary pump without any movable valve body driven by piezo-vibrators, which is invented based on the dynamic passive valve presented by Smith [2].
On the basis of the above research, the cold rotary forging process of a typical gear part, both the upper and lower profiles of which are non-rotary, is investigated numerically and experimentally.
The first one is that an accurate design method of the non-rotary upper die is presented based on the geometrical and kinematic relationship between the upper die and upper profile of parts.
In this condition, termed cervicogenic dizziness, the non-rotary dizziness is described as imbalance or unsteadiness and is related to movements or positions of the neck.
This method, however, might not be easily adopted for imaging systems with a non-rotary gantry, and requires the use of a motion tracking system.
These specialty bits are called SDS, SDS-MAX or Spline-Shank, and these bits cannot be used with a standard, non-rotary hammer type drill.
During last years, resumption of works on constant-flow non pulsatile rotary pumps to be used as heart support devices is observed because of their small dimensions and easier way of implantation.
