Traditionally, the input speed of a Stevenson-type press is constant. Here, we propose a novel approach by varying the input speed of the crank to make the ram’s motion suitable for both deep-drawing and precision-cutting. This approach uses a servomotor as the power input. By properly designing the input speed, the output motion can pass through a desired trajectory. The input motion characteristics are planned with Bezier curves. Optimization is used to improve the output characteristics. Guidelines for defining the optimization problems are discussed. Additional dimensional synthesis is also suggested for reducing the input speed variation. Design examples are given for illustration.
Optimized Kinematic Properties for Stevenson-Type Presses With Variable Input Speed Approach
Contributed by the Mechanism and Robotics Committee for publication in the ASME JOURNAL OF MECHANICAL DESIGN. Manuscript received Apr. 1999. Associate Editor: C. Innocenti.
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Yan, H., and Chen , W. (May 16, 2002). "Optimized Kinematic Properties for Stevenson-Type Presses With Variable Input Speed Approach ." ASME. J. Mech. Des. June 2002; 124(2): 350–354. https://doi.org/10.1115/1.1456163
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