B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
164/120
B26D 1/00 (2006.01) B23D 15/06 (2006.01) B23D 33/02 (2006.01) B23D 33/08 (2006.01) B23D 33/10 (2006.01) B23D 35/00 (2006.01)
Patent
CA 1258816
ABSTRACT OF THE DISCLOSURE There is provided a shearing machine in which the ram can be accurately and smoothly moved up and down with a simple arrangement without need of troublesome adjustment. The shearing machine is so arranged that the ram, when vertically moved, is resiliently guided by spring means and is driven by driving means in such a manner as to be kept urged into contact with the guide means. The shearing machine also has hold-down means which can firmly hold the work-sheet being sheared without producing large noises and damaging the work-sheet. To attain this a hydraulic pump means for the hold-down means is provided with a large diameter piston which will supply a large amount of flow under low pressure and damp the surge and a small diameter piston which will supply a small amount of flow under high pressure. The shearing machine also can perform shearing operations to produce fine workpieces without bending and curling. For this purpose, the shearing machine is provided with hold-up means which will upwardly hold the work-sheet being sheared to prevent the work-sheet from bending and curling. The shearing machine also has a back guage means which can be used to set the widths or lengths into which the work-sheet is to be sheared but which can be moved out of the way to enable a work-sheet to be sheared into a different size.
467327
Arima Yoshitaka
Hirata Tadashi
Ikeda Hidekatsu
Kashihara Yoshihiko
Amada Company Limited
Gowling Lafleur Henderson Llp
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