Importance

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Abstract

The present invention provides a linear motor mounted press machine that generate an optimum thrust for a press tonnage to perform different machining operations including one requiring a greater press tonnage and one requiring a high speed and a smaller press tonnage in an energy efficient manner. A linear motor mounted press machine includes a first linear motor 11, a second linear motor 12 that produces a thrust lower than or equivalent to that of the first linear motor 11, and a coupling switching mechanism 13 that releasably couples output shafts 30, 34 of the first and second linear motor 11, 12 together. A press tool 6 is driven forward and backward by the output shaft 34 of the second linear motor 12. Each of first and second linear motors 11, 12 is a unit linear motor assembly having a plurality of unit linear motors 15 arranged around a press working axis center P. The number of the unit linear motors 15 of the second linear motor 12 is the same as or smaller than that of the first linear motor 11.

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First Claim