| 摘要 |
1,087,886. Wheel cutter machines. EUROPEAN ATOMIC ENERGY COMMUNITY (EURATOM). April 8, 1965 [April 16, 1964], No. 15008/65. Heading B3W. A machine for cutting tubes loosely nested within one another comprises at least three co-planar rotatable cutting discs 8 supported around and equidistantly from a common axis, which is the axis of the tubes to be cut and is perpendicular to the plane containing the discs, each disc having a bevelled edge and being of gradually increasing thickness from the edge to the centre, means for displacing the discs towards and away from the said axis and means for effecting relative rotation between the discs and the tubes to be cut. Each disc 8 is mounted in a carrier 7 which slides in a radial dovetail slot in a block 31 attached to the upper surface of a rotatable plate 9. The carrier 7 also has teeth 33 which engage a scroll formed in the underside of an upper rotatable plate 11. The plates have gear teeth formed on their peripheries and are geared together by a train of wheels 12-16, so that they rotate in the same direction but at different speeds. The gear ratio is chosen so that the different speeds result in the desired radially inward feed of the discs. After a cutting operation the lower plate is locked and the upper plate driven in reverse to retract the discs. Construction of cutting discs.-The crosssection of the discs is asymmetrical, Figs. 4a and 4b. The side face of the cutter tapers at 2 degrees (α) towards the edge, the upper surface has a 10 degrees bevel at the edge (#) and the included angle at the edge is 30 degrees (γ). |
