公开(公告)号：US5851153A

公开(公告)日：1998-12-22

申请号：US262475

申请日：1994-06-20

申请人： Don T. Van Allman ,  James H. Syvarth ,  William M. Heflin ,  Ronnie L. Mc Connell

发明人： Don T. Van Allman ,  James H. Syvarth ,  William M. Heflin ,  Ronnie L. Mc Connell

IPC分类号： F16B19/14 ,  B21G3/16

CPC分类号： F16B19/14 ,  Y10T24/4693

摘要： A steel pin is disclosed of a type to be forcibly driven into a steel substrate by using a powder-actuated tool. The steel pin has a substantially cylindrical shank and a substantially sharp point which extends from one end of the substantially cylindrical shank, which conforms substantially to a tangent or secant ogive except for a substantially spherical tip having a radius in a range of approximately 0.02 inch (approximately 5 millimeters) to approximately 0.03 inch (approximately 7.5 millimeters), which has substantially true concentricity, which has surface-texture irregularities with a roughness-height index value in a range from approximately 10 microinches (approximately 0.25 micrometers) to approximately 15 microinches (approximately 0.38 micrometers), and which appears to be substantially free of other surface imperfections when viewed under 60.times. magnification. The substantially cylindrical shank is joined to the substantially sharp point at a transition having a substantially smooth, continuously curved surface, and is knurled near the transition. The steel pin is made by deforming a length of steel wire as by forging or swaging, so as to form the steel pin with the substantially cylindrical shank and with the substantially sharp point, and reshaping the substantially pointed end as by barrel finishing the steel pin in a finishing medium.

摘要翻译： 公开了一种通过使用粉末致动工具强制地驱动到钢基底中的钢销。 钢销具有基本上圆柱形的柄和从基本上圆柱形的柄的一端延伸的基本上尖的点，其基本上符合切线或割线，除了具有大约0.02英寸范围内的半径的基本上球形的尖端（ 约5毫米）至约0.03英寸（约7.5毫米），其具有基本上真正的同心度，其具有表面纹理不规则，其粗糙度高度指数值在约10微英寸（约0.25微米）至约15微英寸 约0.38微米），并且当在60倍放大倍率下观察时，其似乎基本上没有其它表面缺陷。 基本上圆柱形的柄在具有基本上平滑且连续弯曲的表面的过渡处连接到基本尖锐的点，并且在过渡附近被滚花。 钢销通过锻造或型锻使钢丝长度变形，由此形成具有大致圆柱形的柄和具有大致尖锐点的钢销，并且通过圆筒整形钢销重新形成基本上尖的端部 在整理介质中。