| 摘要 |
A punch press is oriented horizontally with the first and second opposed tools being mounted on first and second members both of which are movable horizontally. These motion members are driven with rapid acceleration toward each other for impacting the fast-moving first and second tools simultaneously against opposite sides of material to be formed between the tools. The two opposed motion members are arranged for the momentum of the first tool with its associated moving parts at the instant of impact be equal to the momentum of the second tool with its associated moving parts so that equal and opposite impulses resulting from momentum cancel each other out. As a result of this opposed motion with momentum-balanced-at-impact, very little energy or work is wastefully lost into the platform on which the punch press is supported and only an insignificant or very modest amount of mechanical shock and vibrations are induced into t he platform. Thus, very little noise is transmitted into the environment via the platform. The material to be formed is fed into the region between the first and second tools by a feed plate which is also movable horizontally in either direction. Various arrangements are disclosed for appropriately positioning the feed plate between the opposed tools for achieving simultaneous impact of the tools against opposite sides of the material to be formed.
|
