The expression window provided by the three-dimensional transform software of the circular section coil spring is an important tool for implementing the parameterized three-dimensional variant. It can easily change the real-time change of the model by the designer's three methods of parameter value modification. To achieve a certain variant requires "giving the curved guide wire a large diameter value. The convex arc-shaped coil spring will become a cylindrical coil spring. It is impossible to change the diameter to realize the transition of the convex arc to the concave arc. Therefore, how to transform from a convex arc-shaped coil spring into a concave arc-shaped coil spring will be described in the following section. The three-dimensional variation of the rectangular-section coil spring can be established according to the establishment steps of the three-dimensional model of the circular section coil spring to establish a rectangular section coil spring. 3D model.
The software can also use certain arithmetic or logic assignment statements, through the value of the feature suppression parameter, the three-dimensional transformation of the circular section coil spring, the number of revolutions of the pitch, and the system will start the model of the rectangular section coil spring and automatically suppress the other three types of springs. The model thus enables automatic deformation between different types of springs. We know that mold springs have been standardized and standardized except for special cases. The above logic judgment statement can also realize the automatic selection of the basic parameters of the standard spring, which will omit a large amount of table look-up time for the designer, thereby quickly realizing the automatic modification between different series in a single type of spring, which is convenient for the following description. It is assumed that there are three series of rectangular cross-section coil springs (set; the parameter names of the series).
By changing the different parameter values ​​of the spring type and specification, the designer can get the desired three-dimensional model of the spring as desired. Although it is only a part of the development of the mold CH, the variant idea and implementation principle can be applied to the mold development. Other aspects, especially the powerful design ability of using CH technology, supplemented by the use of simple logic judgment statements, can meet most of the needs of mold design, thus avoiding complex programming of traditional high-level languages, with high engineering practical value, and For the engineers of the mold company, pointed out a practical and independent development approach.
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