The main advantage of cold stamping process, which is carried out at room temperature, is to offer higher accuracy in terms of the final part shape (net-shaping). On the other hand, the forming level is limited as the material's plastic moment is limited.
This implies that the tooling used for this type of operation in multi-station presses such as Schuler, Sacma, Sakamura, Netschroff, etc. must meet very high specifications in terms of dimension tolerance, surface finish and mechanical resistance. To do so, state-of-the-art steels which are treated to high levels of hardness, micron tolerances and mirror finishes are used. This is the type of product offered by Lazpiur for users of the presses described above, completely guaranteeing the supply chain for all treatments and coatings and comprehensive dimension control which produces long lasting tools even under the most extreme conditions. This not only implies high quality of final products but also as a result, higher profitability in part production.
Semi hot forging
Warm forging is a process created in the 60's and carried out at temperatures between 600 and 900ºC. This temperature is below recrystallisation temperature to allow the production of a wide range of parts. Although this process is not as accurate as cold forging, it achieves very high forming levels (almost as high as hot forging) but without slag production.
Although quite close to net-shaping, manufacturing tolerance ranges of this process could be wider and some machining or auxiliary operations (calibration) are required to achieve the final part shape.
For manufacturing purposes, a wide range of steels in the family of hot-working tools can be used, which also require lower hardness than tools for cold forging and also wider tolerances.
Lazpiur offers this type of tooling with proven quality and specific surface hardening treatments which significantly help to extend the life of the tools.
This type of forging in automated version derived from traditional forging systems where steel temperature reaches 1200ºC to allow progressive forming of the part in different stages. Due to the high temperatures used in this operation, work tolerance is wider and slag is generated. However, due to the plasticity reached by the material at this temperature range, production and deformation of the material are much higher. In addition, the diameter of materials used can be up to 70mm depending on the machine used.
Lazpiur manufactures tooling for this type of automatic presses implementing not only the most suitable materials and best coatings but also making the highly useful air outlet orifices with diameters between 0.5 and 3 mm and depths of up to 200mm.