METALWORKING GUILLOTINES (SQUARING OR POWER SHEAR)
Metalworking guillotines operate by a clamp securing the sheet of material. Similar to
the action of scissors, the blade shears the material, starting at one side of the sheet.
Usually, the cut off piece will fall on to a metal ramp beneath the blade, and slide down the ramp to where it can be recovered.
Guillotines can have mechanical, hydraulic, or pneumatic prime movers. Small guillotines
may be operator-powered by a pedal or handle. The small force provided by the operator is increased to provide much larger force at the blade.
In mechanical guillotines, energy to drive the tool is stored in a revolving flywheel. In hydraulic guillotines, energy for the tool comes from pressure in a hydraulic ram.
In pneumatic guillotines, compressed air replaces hydraulic fluid.
TASK – LOAD & UNLOAD/COLLECT CUT-OFFS
- Wear protective
- Usemechanical aids to lift materials, when
Contact with clamp and blade
- Deep cuts or amputation
- Crushing injuries
- Fixguards to isolate the point of closure at the clamp and
- Useinterlocked guards to avoid
- Off-cuts must have a collection pointthat does not involve reaching into the back of the
- Ensureclamp and blade are interlocked against faults (for full revolution type guillotines).
TASK – GUIDE & CONTROL THE CUT
- Deep cuts or amputation
- Fixguards to prevent reach to moving parts and hands from reaching beneath clamps or
- Coverpedals to minimise the chance of an unintentional
- Neverwear loose clothing or
- Fitpresence sensing If guillotines fail, they must stop safely, and not restart until the fault is repaired.
- Ensureregular testing of the presence sensing
- Ensureviewing slots are small enough to prevent
OTHER (NON-MECHANICAL) HAZARDS
- Hearing damage orloss
- Reducenoise levels by isolating machines or enclosing within noise
- Assess noise
- Arrange hearing
- Always wear hearing
A safe noise level over an eight hour day is 85dB(A). A metalworking guillotine may exceed this noise intensity.
Leaking hydraulic oil
- Tissueand muscle damage
- Puncture wounds
- Applya programme of preventative maintenance (hydraulic hoses and hydraulic hose couplings).
- Leakingoil, or bulging or scraped hose walls, must have faulty parts
- Neveruse hands and fingers to detect
- If oil seeps onto skin, or someone working nearhydraulic oil under pressure thinks they were bitten by an insect, they must be taken to hospital, with full information presented to medical
- Wear appropriate PPE(personal protective equipment).
Hydraulic oil under pressure will get into skin, even through leather gloves.
Slips, trips & falls
- Contact or impactinjuries
- Ensure housekeeping procedures are in place.
- Wear suitable footwear.
- Provide non-slip mats and suitable flooring.
TASK – MAINTENANCE, CLEANING & REPAIRS
Contact, impact or entanglement from moving parts
Faulty or altered machinery
- Lock-out all power supplies before maintenance, cleaning and repairs.
- Provide adequate support for parts that may fall and cause injury.
- Keep written safety procedures, and arrange regular inspections by a competent person.
- Remove or Lock-out guillotines that fail inspection, and do not use until repaired or replaced.
- When a guillotine is altered, a new risk assessment must be done, and safety improvements made.