Servomotor parameter effect on dynamic properties of twist drilling deephole machining system
The property change of the unified dynamic system is considered by the example of the deephole machining process. It is shown that due to the nonlinear relationship formed by the cutting process, in the system, as a rule, the only balance point with the bounded domain of attraction is constructed. The given materials on investigating the domain of attraction show that it depends on the control and cutting forces presented in the state coordinates of the interacting subsystems. While shaving is being accumulated in the chip clearance grooves, this domain degenerates, and the system becomes totally unstable. At this, the tool is blocked, and as a rule, broken. It is shown that the domain of attraction and evolutionary changes of the system properties depending on the shaving accumulation in the drill flutes are basically related to the interacting servomotors parameters. It is proposed to adjust the servomotor parameters on the basis of the introduction of special links.