As a special mechanical product, the mold industry can't produce parts or mechanical products by developing and manufacturing mechanical products like other mechanical industries & mechanical products. Only through the designer's theoretical design can we basically ensure the required functions and use requirements that will be achieved in the end. That is to say, for most other mechanical products, if the processing technology can completely or as far as possible meet the design accuracy and requirements, the final product will not deviate too much from the original design purpose. That is to say, a perfect design can produce a perfect product under the guarantee of processing conditions. At the same time, the theoretical basis of the design of this kind of products, such as various machine tools and power equipment, has become very mature, perfect and practical after decades of continuous research in some old capitalist countries and even hundreds of years of non-development.

Mold products are different, because no matter injection molding, die casting, high-temperature flow molding or normal-temperature stamping plastic molding, although there are decades of research and application history, there are still great uncertainties because the basic theory and mathematical model are not perfect and accurate, especially in China, most of them still rely on the experience of on-site debugging to make the mold products as perfect as possible and the products produced meet the requirements of users, so at the design stage, most of them are at present. ! In other words, the quality of the mold usually depends on the technology of the fitter. The final confrontation of mold products from different manufacturers may be a fitter's skill contest. In this line, designers and pre-processors can only play a supporting role in the confrontation.

I don't know, I didn't say whether the majority of colleagues agree or not, but it is a fact. No matter how perfect the mold design is, no matter how good the drawings are, no matter how expensive the equipment is, at present, it is ultimately up to the die fitter to reflect the former's labor and wisdom. Without them, our design is probably a pile of scrap metal! ! !

In addition, at present, our research on remodeling structures, especially complex mechanical structures (such as various wedge-shaped linkage mechanisms in automobile molds) is not deep enough, and there is no technology or even patent that can lead the world. Some advanced and complex structures are mainly designed with reference to foreign precedents, and the level of independent research and development is relatively weak. On the contrary, assemblers may be better at reassembling and debugging these mechanisms than abroad.

As mentioned above, the imperfect plastic forming theory and mathematical modeling lead to the imperfect analysis and formulation of stamping process in the design stage, which requires a lot of debugging in the later stage of fitter. There may not be an immediate solution to this problem for the time being, and designers have reason to appropriately shirk their responsibilities. However, the mechanical structure of the mold is not good, and we seem a little sorry for this "hard injury". Of course, I think this is also caused by many reasons.

First of all, the relatively high-end mold mechanical structure is usually only used for more complicated parts and processes, such as the pressing of side plates, fenders and hoods of automobiles. Because most domestic automobile manufacturers are Sino-foreign joint ventures and other reasons, it is difficult for domestic mold enterprises to manufacture molds for such products, and they rarely talk about similar parts of brand-new models, so our actual combat opportunities are few. Some powerful manufacturers may have carried out practical theoretical design in production tasks. Finally,!

Second, even in this difficult opportunity, most manufacturers may search for foreign original drawings and then design them. The final mechanical structure may be improved and perfected, become a mold product with China characteristics, and even be exported to these countries. However, it's still difficult to be branded as "Made in China", and foreign drawings and China steel will not panic.