preface
In the existing parts of Guangdong Machinery processing factory, there are not only some processing problems in the proofing process, but also many parts with processing difficulties, which not only affect the production progress and delivery, but also affect the quality of structural parts. For example, the bending of sheet metal parts, often occurs bending tool collision situation; There are too many specifications of fillets, semi-circular boss and special-shaped holes in blanking, as well as some unreasonable shape design, which lead to many unnecessary blanking dies in the processing plant, greatly increasing the processing and management costs of the dies; There are more and more kinds of sheet metal guide rail and drawing boss of plug-in box, which need to be unified and standardized; In spray painting and silk screen printing, unreasonable spray selection often leads to high scrap rate, unable to screen printing and other problems; The spot welding of some sheet metal parts in Guangdong mechanical processing plant can increase the positioning properly, which does not increase the cost and does not affect the appearance. In fact, most of the design depends on the production tooling positioning, which is not only troublesome, low efficiency, but also poor accuracy; Many sheet metal parts that can avoid welding are often designed in the form of fillet welding, welding and grinding are very troublesome, not only the efficiency is low, but also the appearance quality is often not guaranteed, and so on. For a long time, these same problems occur repeatedly, which will have adverse effects on product quality, production and progress.
The purpose of this "structure design process manual" compiled by Guangdong mechanical processing plant is to facilitate engineers to consult some commonly used and key data in structure design, better ensure that the parts designed by engineers have better processing technology, unify structural elements, reduce unnecessary mold opening, speed up processing progress, reduce processing cost and improve product quality. At the same time of compiling this manual, the standard of sheet metal mold manual has been thoroughly adapted, some typical structural shapes have been optimized and serialized, and the variety has been reduced. The related mold modeling in the Intralink library is not only convenient for designers to carry out structural design, but also has a good effect on the unification of mold. Some typical data in the manual are mainly from reference materials, some limit dimensions in process,
Guangdong Machinery processing factory mainly comes from the data provided by the processing factory, which we should follow as much as possible. Some parts in production, some of the size exceeds the limit size given in the manual, but it does not mean that these designs have good processability. In principle, it is to achieve the best processability as far as possible under the condition of meeting the product performance. Due to the limited time and practical experience, errors in the manual are inevitable. I urge you to criticize and correct. I hope that after a certain period of practical test and future supplement, revision and improvement, it can become a very practical reference book and play a good guiding role in our design work. Considering the length and practicability of the manual, and our design is mainly sheet metal parts design, therefore, this manual mainly focuses on sheet metal parts.