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US4345358A Method of and apparatus for manufacturing plowshares 失效
犁制造方法及设备

Method of and apparatus for manufacturing plowshares
摘要:
An improved method of and apparatus for manufacturing plowshares that enables the plowshare bending and shaping operations to be performed with precision in a succession of reciprocal movements while minimizing the need for preforming or treatment of the material from which the plowshare is made prior to placement in the plowshare machine, which method and apparatus is further characterized by a capability of working sheet material of different thicknesses, and which utilizes hydraulic power cylinders.
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