Rough turn O.D.and I.D.with 3°30′taper

  Stress relieve

  Finish all outside dimensions, length to 747 minus on Ampco end.

  Mill groove on O.D.of jaw number10,drill and tap M12 holes on rear of jaw.

  Carburize 1.5mm deep,mask ends.

  Finish mill front of jaw, drill and tap M8 holes on front of jaw. Drill,tap and C’Sink M12 holes O.D.

  Turn I.D. with  3°30′taper

  Heat treat to 52-56HRC. Finish in vertical position.

  Weld on Ampco 18.

  Mill Ampco 18 End and complete grease grooves

  Split jaws

  Mill 18°angle and slot, use fixture.

  Mill cone angle, drill and tap holes on cone angle.

This part is the key part, which is used on the expanding head for pipe expander.

The expander tool consists of a truncated pyramid (wedge), on the surface of which segments are positioned, and an intermediate ring. The segments are guided along the circumference of the wedge and on the intermediate ring face. The intermediate ring is connected with the boom and the wedge with the draw bar. When the wedge is moved through the draw bar, the segments are radially forced outwards, the segment faces resting against the intermediated ring.

The expander tools are accommodated in a transport device. This device consists of two hinged halves shich can be put round the tool. This ensures a simple assembly and at the same time secures the too in position. Thrust screws enable the wedge to be moved and firmly forced against the assembling device through the spacer plate. The tool roller has to be exchanged according to the tube diamater and must be adapted to the respective plate thickness.

Expander head tool sets