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- The daily inspection and test must be done on each press in use within the first four hours of every working period and after setting, resetting or adjustment of the tools when any of the guards or protection devices have been disturbed.
www.tmaeng.co.uk/presses/wp-content/uploads/2012/12/indg316.pdfProcedures for daily inspection and testing of mechanical ...
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Guidance to assist users of power presses and those involved in their installation and maintenance to meet their duties under the Provision and Use of Work Equipment Regulations 1998 (PUWER 98)....
- Safe Use of Power Presses
This Approved Code of Practice and guidance is aimed at...
- Safe Use of Power Presses
- Appointment and training
- Inspection and tests
- Doing the inspection and tests
- Trial strokes
- Additional tests
- Completion of inspection and tests
- Power-off checks for fixed guards
- Power-on checks for fixed guards
- General
- All presses
- Positive clutch presses
- Friction clutch presses
- Static
- Dynamic
- Dynamic
- Static
- Dynamic
- If a guard lock or control is fitted - make several trial strokes and check
- Static
- Dynamic - stroke test
- Mute check - press brakes
- Mute check - power presses
As an ‘appointed person’ you must be properly appointed in writing by your employer, and be suitably trained and competent to carry out all the necessary inspections and tests for the type of press you work on.
The purpose of the inspection and test is to ensure that all the guards and other protective devices, eg light curtains, fitted to the machine are in efficient and effective working order and that the press is safe to use. After the inspection and test, you must complete and sign a certificate (daily inspection card) which is normally kept on or ne...
In order to ensure that the inspection and tests are done safely, some are carried out with: power off - with the machine stationary and appropriately isolated from all power sources, eg electricity, compressed air, and hydraulic pressure; power on - with power sources restored to the machine. These tests can be either: static - with the machine st...
Trial strokes should always be carried out with all safeguards in place.
Some types of guard (eg sequentially operated) may require additional checks to those set out in this guidance; in such cases the manufacturer’s guidance should be followed.
If the guarding system or safety device fails any of these inspections and tests: switch the press off and isolate it; attach a suitable warning label; inform the supervisor and operators; do not use it until appropriate remedial action has been taken. The press certificate should only be completed, signed and dated upon satisfactory completion of ...
Check that the guards are securely fastened in place with devices requiring a tool to release them and that no access is possible from any direction to the danger zone; Check that the construction of the guard is sound, that no bars are bent or missing and that the guard cannot be bent or deflected to permit access to the danger zone; Check that wh...
Check that there are no other trapping points created between the guard itself and any moving part of the machine or adjacent equipment. INTERLOCKING GUARDS
An interlocking guard is one which is movable, or has a movable part(s), and is interconnected (either mechanically, electrically, hydraulically or pneumatically) with the control system of the machine so that: it prevents the machinery from moving until the guard is closed; and the guard remains locked closed until the dangerous movement has stopp...
Check that the guard is secured to the press and that it prevents access to the danger zone from any direction when the guard is closed; Check that there are no missing, loose, bent or unduly worn parts; Check that the toolsetter’s connection (where fitted) is ‘spanner tight’ and in good condition; Check that the guard taper pins are tight; Check t...
Check that the guard control disc/cup is secure, that the slot is not oversized (usually understood to mean that the slot size is not greater than 1.5 times the diameter of the roller) and that the roller runs freely; On presses where there is mechanical actuation of the extractor, press the pedal, close the guard slowly and then check that the ext...
Check that the control disc/cam is secure and that there is no undue wear on the slot which receives the control arm and roller; Check that the roller rotates freely and enters the slot when the guard is opened; (for a pneumatic guard control, check that the roller is not worn and that it is lying in the bottom of the cam profile); Check the integr...
Check the correct functionality of limit switches.
Check that there are no other danger areas created between the guard itself and any moving part of the machine or adjacent equipment.
Check that the guard operates freely under normal operating conditions; Check that the brake stops the crankshaft at its normal stopping position and that at this point the guard control roller drops into the slot when the guard is opened; Make several trial strokes and check that the guard can be opened only when the crankshaft has stopped at its ...
With the flywheel stationary, close the gate slowly and check that the limit switches do not operate until the gate has fully closed (plus an overlap of 10% of total gate movement); at this point the guard control roller should just be clear of the slot in the control disc. (NB: It may be easier to assess the point of operation of the limit switche...
Start the flywheel, then: Check that the guard operates freely under normal operating conditions; Check to ensure that the crankshaft stops at its normal stopping position -usually TDC;
that the guard can only be opened when the crankshaft has stopped at its normal stopping position - usually TDC; or If no guard lock or control is fitted - initiate a stroke and immediately attempt to reopen the guard; check that there is no movement of the press slide with the guard open; Where a pneumatic guard control is fitted check it is not p...
Check that the light curtain is functioning, then switch off the ‘mute’ function (if fitted); Check the operational effectiveness by inserting a test piece (of a type specified by the guard or press manufacturer/supplier) into the light curtain and at right angles to the plane of it. It should be passed very slowly through the full height of the cu...
Check the closing motion of the tools by initiating a press stroke and inserting the test piece into the light curtain at right angles to the plane of it; ensure that the closing motion of the tools stops without apparent delay. At no point should an attempt be made to insert the test piece between the tools.
Switch to mute mode (if fitted). Check to ensure that the ‘Guard off’ sign is illuminated. Check to ensure that muting does not occur until the top tool is 6 mm or less from the workpiece surface. (NB: If power press tools are being used, ensure that the muting facility is inoperative and that the photo-electric device is operative throughout the c...
If the light curtain is muted on the return stroke, check to ensure that there are no accessible trapping points created.
This Approved Code of Practice and guidance is aimed at employers, dutyholders and anyone who has responsibility for the safe use of power presses, such as managers and supervisors. It gives...
Inspections of power presses and press brakes, plus other PUWER inspections. Part IV of the Provision and Use of Work Equipment Regulations 1998 (PUWER) requires thorough examination and testing of power presses and press brakes, including their guards and protective devices.
Mar 28, 2024 · 1) Regular Inspections. Conducting daily, weekly, and monthly checks as part of your press brake maintenance, can catch issues early and prevent expensive downtime. You should inspect everything from the hydraulic system to the tooling, looking for signs of wear, leaks, or misalignments. 2) Lubrication. Proper lubrication is the lifeblood of ...
Jan 11, 2024 · How Often Should You Maintain Your Press Brake? The frequency of maintenance for an industrial press brake can vary depending on several factors, including its usage, environmental conditions, and the manufacturer’s recommendations.
Feb 25, 2011 · A press brake's mechanical components—piston bolts, chain sprockets, and guides—must be checked a minimum of twice a year. Regularly check the connection between the pistons and ram. Check all bolts and screws for tightness.
