Views: 291 Author: Site Editor Publish Time: 2017-09-21 Origin: Site
These machines can perform a number of functions, including shearing, punching, notching or bending.
On larger machines, operations may be disconnected from the prime mover while it isn’t in use. However, usually the machine in use and a number of tools nearby will operate at the same time. If the punch and shear is large enough, two operators may work together, using two pedals without interference.
Modern punch and shear machines have hydraulic prime movers. In older machines, the energy driving the tool is stored in a revolving flywheel. A clutch connects the flywheel to the crankshaft, which in turn drives the tool. At the start of the stroke the operator engages the clutch to connect the flywheel energy to the crankshaft. A key clutch connects the flywheel and tool for one revolution of the flywheel. In hydraulic machines, energy for the tool comes from pressure in a hydraulic ram. Hydraulic oil flows into the ram, controlling whether the tools moves, or how fast.
TASK–LOAD/UNLOAD MATERIALS
TASK–MACHINE OPERATION
Broken tooling can eject from the machine, becoming a projectile. Metal pieces may move or change shape as they are worked on.
OTHER (NON-MECHANICAL) HAZARDS
TASK–MAINTENANCE, CLEANING & REPAIRS