Using Reachability Map to Design a Dual Arm Robot

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Abstract. In this paper, we present an approach to design a dual-arm robot that purposes to meet the need of automation for low batch for but a various type of ...
Using Reachability Map to Design a Dual Arm Robot for Precision Assembly Abstract In this paper, we present an approach to design a dual-arm robot that purposes to meet the need of automation for low batch for but a various type of production lines. The kinematic feature and reachability map of a 7 degree-of-freedom (DOF) industrial robot are introduced. The bimanual workspace of the dual-arm robot is analyzed by adjusting the distance and angle between the two identical robot arms (left and right arm). We also proposed a cooperative reachability map as a criteria to evaluate the design of the dual-arm for the assembling tasks.

Figure and Table:

Figure 1. Process of computing Reachability Map.

Figure 2. Visualization of the reachability map for robot arm PMC 22. For better visualization, the map is cut in half.

TABLE I DENAVIT-HARTENBERG PARAMETERS FOR ROBOT ARM - PMC22. αi-1 i ai-1 di θi Upper Lower 1 2 3 4 5 6 7

0 0 0 0 0 0 0

0 -90 90 -90 -90 90 -90

0.407 0 0.304 0 0.353 0 0.077

0 0 0 -180 180 0 0

180 115 180 -55 360 100 190

-180 -114 -180 -297 0 -100 -190

Figure 3. Common reachability maps with the different angles between the robot arms and the robot body.

Figure 4. Cooperative reachability map vs. Common reachability map.

Figure 5. PMC 14-axis dual-arm robot. The configuration of two arms is according to the result of our analysis. This robot was exhibited in the 2014 “Taiwan Automation Intelligence and Robot Show” (TIROS), which is the premier robotics convention in Taiwan.

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