2 research outputs found
A Novel method for the design of 2-DOF Parallel mechanisms for machining applications
Parallel Kinematic Mechanisms (PKM) are interesting alternative designs for
machine tools. A design method based on velocity amplification factors analysis
is presented in this paper. The comparative study of two simple
two-degree-of-freedom PKM dedicated to machining applications is led through
this method: the common desired properties are the largest square Cartesian
workspace for given kinetostatic performances. The orientation and position of
the Cartesian workspace are chosen to avoid singularities and to produce the
best ratio between Cartesian workspace size and mechanism size. The machine
size of each resulting design is used as a comparative criterion
The Optimal Design of Three Degree-of-Freedom Parallel Mechanisms for Machining Applications
The subject of this paper is the optimal design of a parallel mechanism
intended for three-axis machining applications. Parallel mechanisms are
interesting alternative designs in this context but most of them are designed
for three- or six-axis machining applications. In the last case, the position
and the orientation of the tool are coupled and the shape of the workspace is
complex. The aim of this paper is to use a simple parallel mechanism with
two-degree-of-freedom (dof) for translational motions and to add one leg to
have one-dof rotational motion. The kinematics and singular configurations are
studied as well as an optimization method. The three-degree-of-freedom
mechanisms analyzed in this paper can be extended to four-axis machines by
adding a fourth axis in series with the first two