Abstract
This paper deals with possible new concepts for machine tools based on parallel kinematics for advanced manufacturing. Parallel kinematics machines (PKM) enable the mechanical properties of manufacturing machines to be improved. This has been proven by several new machine tool concepts. However, this potential can be and must be increased by applying the principle of redundant actuation. This paper deals with the extension of the concepts of redundantly actuated parallel kinematics structures for five-sided five-axis machine tools and for a free-forming sheet metal forming machine. The design principles of previous successful PKMs are summarized and new concepts are proposed. The most important requirement criteria are summarized. The proposed concepts are qualitatively and initially quantitatively evaluated according to these criteria.
Highlights
Parallel kinematics machines (PKM) represent a new concept in the design of machine tools [6, 7]
Few PKMs have been successful on the market, due to new design problems resulting from the parallel kinematics concept
This paper deals with the extension of the concepts of redundantly actuated parallel kinematics structures for five-sided five-axis machine tools and for a free-forming sheet metal forming machine
Summary
Parallel kinematics machines (PKM) represent a new concept in the design of machine tools [6, 7]. This paper deals with the extension of the concepts of redundantly actuated parallel kinematics structures for five-sided five-axis machine tools and for a free-forming sheet metal forming machine These concepts can be divided into full, hybrid and modular PKMs. a fraction of the frame cube (e.g. 1:5), the ratio between the workspace and the machine space is much better than for other parallel kinematics concepts. A fraction of the frame cube (e.g. 1:5), the ratio between the workspace and the machine space is much better than for other parallel kinematics concepts These properties pose quite large demands on the angular extent of the spherical joints, and these requirements have led to a special design of the new spherical joints [3]. The result is that a cube with the size of 25% of the Octapod frame can be really five-side machined
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