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    • 3. 发明授权
    • Method of securing workpieces together
    • 将工件固定在一起的方法
    • US06397469B2
    • 2002-06-04
    • US09809386
    • 2001-03-15
    • James R. Parker
    • James R. Parker
    • B21K2300
    • B21D39/03B23D29/005Y10T29/49623Y10T29/49915Y10T29/49936Y10T403/4966Y10T403/4974Y10T403/4991
    • A power assisted combination shear used for forming structural louvers in the crimped seam of structural steel decking comprises a frame supporting a pair of jaws which are opened and closed by means of an operator-controlled pneumatic cylinder. One jaw terminates in a blade and the other jaw has a corresponding die member. The blade and die have undercut reliefs in the root portions, which permit the louver to be formed without breaking through to the edge of the seam. The louver comprises a sheared portion in the form of a bowed tab bridging a corresponding window formed in the seam by the shearing of the tab. The interference between the louver and window provides a substantial increase in the lateral resistance (shear strength) of the crimped seam, thereby obviating the need to additionally weld or screw the seam to provide the necessary shear strength for even the highest stress applications.
    • 用于在结构钢板的卷曲缝中形成结构百叶窗的动力辅助组合剪切包括支撑通过操作者控制的气缸打开和关闭的一对夹爪的框架。 一个爪终止于刀片,另一个钳口具有相应的模具构件。 叶片和模具在根部具有底切浮雕,这允许形成百叶窗而不破坏接缝的边缘。 百叶窗包括弯曲部分,该弯曲部分通过剪片的剪切而桥接形成在接缝中的相应窗口。 百叶窗和窗户之间的干涉提供了卷曲接缝的横向阻力(剪切强度)的显着增加,从而避免了对于甚至最高应力应用提供必要的剪切强度的缝隙或螺纹接缝的需要。
    • 6. 发明授权
    • Pneumatic shear for forming structural louvers
    • 用于形成结构百叶窗的气动剪切
    • US06212932B1
    • 2001-04-10
    • US09356540
    • 1999-07-19
    • James R. Parker
    • James R. Parker
    • B21J918
    • B21D39/03B23D29/005Y10T29/49623Y10T29/49915Y10T29/49936Y10T403/4966Y10T403/4974Y10T403/4991
    • A power assisted combination shear used for forming structural louvers in the crimped seam of structural steel decking comprises a frame supporting a pair of jaws which are opened and closed by means of an operator-controlled pneumatic cylinder. One jaw terminates in a blade, the other jaw has a corresponding die member. The blade and die have undercut reliefs in the root portions, which permit the louver to be formed without breaking through to the edge of the seam. The louver comprises a sheared portion in the form of a bowed tab bridging a corresponding window formed in the seam by the shearing of the tab. The interference between the louver and window provides a substantial increase in the lateral resistance (shear strength) of the crimped seam, thereby obviating the need to additionally weld or screw the seam to provide the necessary shear strength for even the highest stress applications.
    • 用于在结构钢板的卷曲缝中形成结构百叶窗的动力辅助组合剪切包括支撑通过操作者控制的气缸打开和关闭的一对夹爪的框架。 一个爪终止于刀片,另一个钳口具有相应的模具构件。 叶片和模具在根部具有底切浮雕,这允许形成百叶窗而不破坏接缝的边缘。 百叶窗包括弯曲部分,该弯曲部分通过剪片的剪切而桥接形成在接缝中的相应窗口。 百叶窗和窗户之间的干涉提供了卷曲接缝的横向阻力(剪切强度)的显着增加,从而避免了对于甚至最高应力应用提供必要的剪切强度的缝隙或螺纹接缝的需要。