| 摘要 |
Disclosed is apparatus for forming an annular groove or recess in the external surface of a pipe section at a predetermined distance from the open end of the pipe. The grooving apparatus comprises a cylindrical body with a tapered external surface at one end, the external diameter of the tapered end increasing with axial distance from the open end. An inwardly projecting lip is formed on the internal surface of the grooving tool and axial slots cut into the tapered surface and the lip. The grooving tool cooperates with a sizing tool having a correspondingly tapered internal surface. The open end of a pipe section is forced through the sizing tool to form a sized end portion of predetermined length. The grooving tool is then forced axially into the sizing tool radially compressing the tapered surface of the grooving tool and deforming the inwardly projecting lip on the internal surface thereof into the pipe to form an annular groove or recess in the external surface of the pipe at a predetermined distance from the open end of the sized pipe. |
