Table 2 Linkage-optimization principles corresponding to motion-planning principles
From: Phase-Division-Based Dynamic Optimization of Linkages for Drawing Servo Presses
Phase division | Principles of motion planning | Principles of linkage optimization |
|---|---|---|
SegWork | Slide speed meets technological requirements and slide running time in this segment is as short as possible | The slide velocity VsWkC in SegWork is constant and the corresponding slide displacement should be as long as possible in the work stroke S c |
Energy loss due to mechanism friction in SegWork should be as low as possible | In SegWork, friction loss of linkage joints based on set load curve should be kept lowest | |
Ideal equivalent arm m IE should be small | ||
SegFeed | Consistent with feeding motion; velocity fluctuation should be minimized | The open height and open angle of die satisfy defined constraints |
Vibration and noise | The max acceleration of slide near the top dead center and linkage pressure angle meet defined constraints | |
SegDec and SegBkAcc | Required work rating is met, energy consumption should be minimized | The equivalent inertia of linkage should be as low as possible; equivalent inertia including slide and upper die weight should be as low as possible |
Eccentric rotary speed should be fast and VsWkC should be slow in SegWork, respectively | ||
E-stop and braking time being met. | Downward equivalent inertia with slide and upper die weight should be as low as possible |