Abstract:

In order to simplify the design of pattern outline of the automatic equipment such as quilting, jacquard, knitting and so on, make up the defect that the complex curve in the existing textile equipment cannot be directly implanted, and increase the interpolation function of the B spline curve, the method for separating the spline curve into micro segment line or circle was used to obtain the simple pattern data containing only micro-segment straight line and micro-segment arc information. The line interpolation algorithm and circular interpolation were adopted to distribute stitching points on the pattern data uniformly. Programming simulation was carried out to verify validity using MatLab. The application results show that the approximate double circular arc can be smooth connected at the connection point together with first distributed continity and the number of fitting segments is least. The stitches of the pattern are evenly distributed together with the small error. The complex patterns interpolation can reach the requirements for processing and the numerical calculation is simplified. This method realizes complex curve application in computer numerical xintrol weaving engineering.

Key words: pattern outline, B spline curve, processing code, double-arc approach, MatLab simulation, pattern data