Method Of Taking Off
There are many kinds of ways to take off, and different ways of taking off often rely on the design methods used.
However, on the basis of understanding what is the degree of stigma, it is found that although the technique of picking is different, the principle of taking off is similar.
In 1985, the author studied with Xing Dehai, the chief engineer of the second light Bureau of Beijing, and put forward the new concept of "cross seesaw principle", striving for a breakthrough in dealing with natural stilts.
Through many years of teaching practice in Beijing, Guangzhou, Chengdu, Qingdao, Shanghai, Tangshan, Luohe, Zaozhuang, Quanzhou, Huang Bu, Jilong and so on, it has verified the scientificity and practicability of cross picking.
In 1997, the book published the book "design principle of leather shoes like structure", and gave a detailed deduction and explanation for the handling of natural stilts and changeover.
For conversion sedan, though it is difficult to get trouble, it is simple in principle, equivalent to dealing with a natural stilt with larger angle. Its processing method is the same as that of natural stilts. The principle of cross seesaw is also applicable to it. This greatly simplifies the process of taking off.
After summarizing the teaching experience in Guangdong Baiyun University, Yangzhou University Guangling college, Hebei Xingtai Polytechnic College and Fujian Sanming University, taking into account the requirements of practical teaching in higher vocational education, the book does not repeat the theoretical deduction of the seating theory, and compresses the basic concept of taking off into the introduction of this book, with emphasis on the application of the principle of cross picking.
Through the practice of 20 years, people's cognition has changed greatly. This book will be narrating in the simplest, most practical and relatively perfect way at present.
What is the principle of cross picking?
If the circle on the last surface is flattened, there must be a overlap angle.
The position of this overlap angle is variable.
In order to illustrate the problem, we can use a set of crosses to divide the circle into four quadrants. The location of the corner will change according to the different structure of the shoe in different quadrants.
If the position of the natural stilts is treated as a positioning and picking up, the seating treatment with its relative position is called counterpoint picking. In addition, it will also extend the conversion to take off, double line pick up, double conversion, and so on, as shown in Figure 0-6.
Double conversion sedan appears in the design of cylinder boots, and is introduced later.
The principle of cross seating is: in the process of picking up the design of the structure, if the center is not changed, the size of the seating angle will not change. It will only change the position of the pick. It will not affect the effect of taking off. If the change of the center is changed, the size of the corner should be adjusted to achieve the same effect.
This passage contains two meanings of change and invariance, forming the core content of the principle of cross picking.
The following chapters will explain the application process of cross seesaw.
There are many experience methods for the handling of technological seating. This article will also be adopted. The duplicate picking method will be selected.
In structural design, taking off is a bottleneck problem. Once the bottleneck is overcome, the technical design of the template will no longer be difficult, and the focus of the design can be steadfastly laid down.
Source: world clothing shoes and hats net
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