Papers by Keyword: NC Interpolation

Abstract: In order to get the exact water cutting of the complexity shape, the 6-DOF robot kinematics model is put forward. The gesture of every point can be calculated in real-time through NC interpolation algorithm of the expected discrete points on the track. On the basis of the matrix of position and gesture, a precise control method of 6-DOF water cutting robot trajectory and attitude of the end is proposed which comes from the improved NC-based code and could get any angle cutting surface, which is easy to program off-line. Finally, the simulation verity of NC interpolation control is made by VC and MATLAB tools.

Abstract: An improved interpolation method is presented based on B-spline curve back calculation which regards data points as control points. First, a B-spline surface reconstruction is done, and a favorable condition for real-time interpolation can be provided for NC machining. Then, by prejudging the trajectory feedrate, the tangent vectors of spline curve junction can be calculated, which can be used to establish the spline curve equations based on time. At last, with the equations mentioned above, the trajectory and feedrate profile can be generated simultaneously by the improved interpolation algorithm. An error analysis is also discussed and the feasibility of the improved algorithm is verified by the simulation results.

Abstract: In order to machine the complex free surface, in this paper, NC interpolation of any complex surface is realized used the recursive reconstruction algorithm. The interpolating errors of this algorithm are controllable, and its applicability is relatively wide. Then, these NC codes of the complex human’s free surface are obtained with data exchange of the manufacturing module in the software UG, and machining simulation is obtained used NC codes. Finally, these NC codes are entered into the NC micro-machine tool, which is controlled by the PMAC and developed by ourselves, and the experimental research of the human’s free surface has been finished on this machine tool. The experimental results show that the NC interpolation accuracy of this recursive reconstruction algorithm is very high, and the machining simulation and machining experiments of the complex human’s surface are completely consistent. The study result shows that the complex surface molding is smooth and continuous, and the machined surface is satisfactory.