tailieunhanh - Associated Technologies And Milling Cutter by J Smith_1

Tham khảo tài liệu 'associated technologies and milling cutter by j smith_1', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 4 Milling Cutters and Associated Technologies Mit der Dummheit kdmpfen Gotter selbst vergebens TRANSLATION Against stupidity the Gods themselves struggle in vain. FRIEDRICH VON SCHILLER 1759 - 1805 Die Jungfrau von Orleans 150 Chapter 4 Milling - an Introduction At its most basic level a milling operation involves a co-ordinated linear or multiple-axis feeding motion of the multi-edged cutter1 as it rotates across and into the workpiece. Milling cutters are usually fitted into a driven rotating machine spindle for a range of machine tools. The type of machines available is quite diverse and include milling machines machining centres2 mill turn centres3 plano-mills4 etc. In special cases 1 Fly-cut milling is the exception here as it is considered a milling operation that will normally utilise only one cutting edge it is similar in design and operation to that of a two-cutting edged trepanning tool. A fly-cutter is usually employed for the machining of large diameter circular features where either the hole is the required component feature or the circular blank is the necessary item from for example a large wrought plate sheet. 2 Machining centres are milling machines equipped with an automatic tool changer - for fast and efficient tool changing . to reduce down-time to a minimum having either a vertical or horizontal spindle configuration although multispindle machines can also be used. Predominantly machining centres have what is known as orthogonal axes - having each axis at 90 in relation to each other. A basic machining centre has three orthogonal axes . X Y and Z but can have rotational axis . A B and C incorporated onto them or built into the structure of the machine tool. Some of these machine tools may have 6-axes . 3 linear and 3 rotational or more necessary for any complex free-form sculptured machining work. 3 Mill turn centres as their name implies can turn parts and with controlled rotational axes coupled with driven live spindles

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