If you lose the
clamping force," he adds, "you get vibrations in the spindle.
The Unilock
clamping modules can either be integrated into the machine table or mounted as an assembly onto the table surface.
C-clamps, strap clamps, and T-slot clamps have adjusting screws to apply
clamping force.
Negri Bossi rolled out its new 1500-ton Bi-Power two-platen hybrid model featuring electric injection, hydraulic
clamping, and two traversing cylinders on the moving platen.
The
clamping mechanism is purely hydraulic, without the assistance of any extra devices, so that considerably higher hydraulic pressures are necessary.
Starting from the RSOX layout, the company has increased the
clamping force and the machine dimensions, especially the platen size.
Standard features: Closed-loop control of
clamping, injection, ejection; LCD screen, self-diagnostics; digital setting and readout of actual ejector position.
A further benefit of
clamping is a consistent yield of high-quality parts.
Choices in
clamping can be quickly narrowed by evaluating requirements for
clamping force,
clamping direction, and, depending on shop or plant environment, clamp material.
The pneumatically-powered clamps are adjustable over a range of
clamping forces from 20 lb to 160 lb.
Strickley points out that such a timesaving feature is not possible with
clamping on the four tiebars.
A rule of thumb in
clamping is to try to minimize exerting force, both to minimize wear and tear on the clamp and to minimize workpiece deflection, says Mr Ruffley.
