| 摘要 |
An apparatus for forming grooves in the cylindrical surfaces of tubes or rods has a passage through the apparatus with a grooving roller mounted adjacent the passage. The roller has a helically extending ridge formed on its circumference, with the ridge extending into the passage and the roller being mounted for rotation about an axis inclined to the axis of the passage. The angle of inclination of the axis is such that the ridge, where it extends into the passage, runs at right angles to the axis of the passage. The roller is made to rotate about the tube or rod as the tube or rod passes through the apparatus.
|
