What are the basic characteristics of precision mold processing
Basic characteristics of precision mold processing:
1. Complex shapes and surfaces Some products, such as automobile covers, aircraft parts, toys, and home appliances, have shaped surfaces composed of various curved surfaces, and some curved surfaces must be treated with mathematical calculation methods.
2. High processing accuracy requirements: A mold is generally composed of a concave mold, a convex mold, and a mold base, and some may be a multi-piece modular. There are a combination of upper and lower molds, a combination of inserts and cavities, and the assembly of modules requires high processing accuracy. The dimensional accuracy of precision molds often reaches μm level.
3. There are many precision mold processing procedures: milling, boring, drilling, reaming, and tapping threads are always used in mold processing.
4. Repeated production: The use of molds has a life span. When the use of a mold exceeds its life, a new mold must be replaced, so the production of molds is often repetitive.
5. Small batch size: The production of molds is not large-scale batch production. In many cases, only one is produced.
6. Profiling processing: Sometimes there is no pattern or data in mold production, and profiling processing should be performed according to the real object. This requires high imitation accuracy and no deformation.
7, excellent mold materials, high hardness The main materials of the mold are mostly made of high-quality alloy steel, especially for high-life molds, often using Crl2, CrWMn and other bainite steel. These steels have strict requirements from rough forging, processing to heat treatment. Therefore, the compilation of processing technology can not be ignored, and heat treatment deformation is also a problem that needs to be taken seriously during processing.
According to the above-mentioned characteristics, it is necessary to meet the processing requirements as much as possible when selecting the machine tool. For example, the function of the CNC system must be strong, the machine tool must have high accuracy, good rigidity, good thermal stability, and contouring functions.
