tailieunhanh - High speed machining 2011

High speed machining and conventional die and mould machining Reprint from Metalworking World .HSM - High Speed Machining There are a lot of questions about HSM today and many different, more or less complicated, definitions can be seen frequently. Here the matter will be discussed in an easy fashion and from a practical point of view. This article is the first in a series of articles about die and moldmaking from Sandvik Coromant. In a following article HSM will be further discussed. Historical background The term High Speed Machining (HSM) commonly refers to end milling at high rotational speeds and high surface feeds. For. | High speed machining and conventional die and mould machining SANDVIK Reprint from Metalworking World HSM - High Speed Machining There are a lot of questions about HSM today and many different more or less complicated definitions can be seen frequently. Here the mailer will be discussed in an easy fashion and from a practical point of view. This article is the first in a series of articles about die and moldmaking from Sandvik Coromant. In a following article HSM will be further discussed. Historical background The term High Speed Machining HSM commonly refers to end milling at high rotational speeds and high surface feeds. For instance the routing of pockets in aluminum airframe sections with a very high material removal rate. Over the past 60 years HSM has been applied to a wide range of metallic and non-metallic workpiece materials including the production of components with specific surface topography requirements and machining of materials with a hardness of 50 HRC and above. With most steel components hardened to approximately 32-42 HRC machining options currently include rough machining and semi-finishing of the material in its soft annealed condition heat treatment to achieve the final required hardness 63 HRC machining of electrodes and Electrical Discharge Machining EDM of specific parts of the dies or molds specifically small radii and deep cavities with limited accessibility for metal cutting tools finishing and super-finishing of cyl-indrical flat cavity surfaces with appropriate cemented carbide cermet solid carbide mixed ceramic or polycrystalline cubic boron nitride PCBN With many components the production process involves a combination of these options and in the case of dies and molds it also includes time consuming hand finishing. Consequently production costs can be high and lead times excessive. Typical for the die and mold industry is to produce one or a few tools of the same design. The process includes constant changes of the .