Transition method and system from helical winding to hoop winding of composite fibers

A method for winding composite fibers, comprising the following steps:

• performing helical winding of composite fibers about a mandrel, the composite fibers exhibiting a slip coefficient, the mandrel extending between a left head and a right head, a cylinder body disposed between the left head and the right head, a left equator disposed between the left head and the cylinder body, a right equator disposed between the right head and the cylinder body, a left polar hole disposed at the left head, and a right polar hole disposed at the right head;
• taking a termination point of the helical winding as an iteration starting point of a helical winding transition section, wherein the iteration starting point is located at the left polar hole or the right polar hole of the mandrel;
• performing iterative calculation forward from the iteration starting point according to an equation set of a winding angle and a center angle of rotation to obtain a winding angle at an iteration termination point, wherein a direction from the iteration starting point to the cylinder body is defined as a front direction;
• and
• determining whether the winding angle at the iteration termination point is greater than a first preset angle to obtain a first determination result;
• if the first determination result is yes, adjusting the slip coefficient corresponding to the cylinder body according to the first preset angle, extending a length of the helical winding transition section to a front equator, and performing hoop winding of the composite fibers about the mandrel at the front equator at the first preset angle;
• wherein the front equator refers to a corresponding one of the left equator or the right equator when composite fibers winding direction is taken as a forward direction;
• wherein, based on the left polar hole being the iteration starting point, the right equator is the front equator, the left equator is a rear equator, and the right head is a front head;
• and wherein, based on the right polar hole being the iteration starting point, the left equator is the front equator, the right equator is the rear equator, and the left head is the front head;
• and
• wherein the step of adjusting the slip coefficient corresponding to the cylinder body according to the first preset angle further comprises the following steps:
• taking a winding angle at the rear equator during the iterative calculation as a first winding angle, and adjusting the slip coefficient corresponding to the cylinder body by a slip coefficient calculation formula according to the first winding angle and the first preset angle;
• if the first determination result is no, determining whether a number of times of determination of the first determination result of no reaches a preset number of times;
• if yes, setting the number of times of determination to 0, and returning to the step of “setting a slip coefficient”;
• and if not, searching for a return point on the front head, taking the return point as the iteration starting point, and returning to the step of “performing iterative calculation forward from the iteration starting point according to an equation set of a winding angle and a center angle of rotation”.