Talking about the basic characteristics of mold processing

2021-03-23 19:17:49 admin

Talking about the basic characteristics of mold processing




  The basic characteristics of mold processing




  (1) High processing accuracy is required. A mold is generally composed of a female mold, a convex mold and a mold base, and some may also be a multi-piece split module. Therefore, the combination of upper and lower molds, the combination of inserts and cavities, and the assembly of modules require high machining accuracy. The dimensional accuracy of precision molds often reaches the μm level.




  (2) Complicated shape and surface Some products such as car covers, aircraft parts, toys, and household appliances, the shape of the surface is composed of a combination of multiple curved surfaces. Therefore, the mold cavity surface is very complicated. Some curved surfaces must be processed by mathematical calculation methods.






   (3) Small batches The production of molds is not mass production, and in many cases only one pair is produced.




   (4) Multiple processes. In mold processing, multiple processes such as milling, boring, drilling, reaming, and tapping are always used.




  (5) The use of repetitive production molds has a long life. When the use of a pair of molds exceeds its life, a new mold must be replaced, so the production of molds is often repetitive.




  (6) In the production of profiling molds, sometimes there is neither pattern nor data, and profiling must be performed according to the actual object. This requires high imitation accuracy and no deformation.




  (7) The mold material is excellent, and the main material of the mold with high hardness is mostly made of high-quality alloy steel, especially the long-life mold, which is often made of ledeburite steel such as Crl2, CrWMn. This kind of steel has strict requirements from blank forging, processing to heat treatment. Therefore, the preparation of processing technology cannot be ignored, and heat treatment deformation is also a problem that needs to be taken seriously in processing.




  According to the above-mentioned many characteristics, it is necessary to meet the processing requirements as much as possible in the selection of machine tools. For example, the function of the numerical control system should be strong, the machine tool precision should be high, the rigidity should be good, the thermal stability should be good, and it has the function of profiling.




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