| 摘要 |
<p>1,216,746. Shearing. DAINIPPON INK & CHEMICALS Inc. 2 May, 1968 [4 May, 1967], No. 20763/68. Heading B3W. Apparatus for shearing metal pipes, bars and other sections comprises a fixed die 5 mounted in a body 3 slidable on a frame 1 and a rotatable die 11 mounted in a fixed housing 4. Within an outer eccentric rotor 7 rotatable in a bearing 6 in the housing 4 is an inner eccentric rotor 8. A die supporter 10 in which the die 11 is centrally mounted is located by a bearing 9 within the rotor 8. The rotors are driven at high speed, 1500-300 r.p.m., by means of a pulley 12. When the eccentric rotors are in the Fig. 2 position the centre P of the die 11 coincides with the centre of curvature of the bearing 6. The die supporter 10 is prevented from rotating on its axis, but allowed to move in a circular path when the relative position of the rotors 7, 8 is varied, by a link 13 which is mounted on a pin 16 on the base means of a slot 15. The position of rotor 8 can be varied relative to rotor 7 by means of an hydraulic piston and cylinder 17 connected to the rotor 7 at 20 and to the rotor 8 at 17<SP>1</SP>. Hydraulic oil is supplied to and exhausted from the cylinder via inlet 23 and outlet 22 and conduits 24, 25 ,28, 29, 32 and 33 in the rotors. In use a pipe, bar &c. is placed in the dies in their Figs. 1 and 2 position, and whilst the rotors are driven the piston-rod 19 is extended causing the die supporter 10 and thus the die 11 to move in a circular path about the centre Q of the inner rotor to shear the pipe &c. A thin walled pipe may be supported on a core (35), (39) (Fig. 5, not shown) during shearing and bars of angle section, such as L and T (Fig. 6, not shown) are made up to a regular solid shape by reinforcing blocks (42), (44), (44<SP>1</SP>).</p> |
