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bluefingers  
#1 Posted : 01 October 2013 19:31:47(UTC)
Rank: Forum user
bluefingers

In our factory, heavy fabrication for the off shore industry, we have a 500 tonne Pearson brake press. It is an old machine and it is seldom used. However, it has not got any light screens fitted to it. I have been asked to carry out a risk assessment for the safe operation of the machine.
As the company does not want to invest in light screens, I wonder if I could restrict the oil flow to slow the speed of the machine down. Additionally, restrict the use of the press to a small number of operatives who are more familiar with the machine.
Do members think that this could be a solution, and that I could use this as the basis for a safe system of work?
JJ Prendergast  
#2 Posted : 01 October 2013 23:27:52(UTC)
Rank: Super forum user
JJ Prendergast

You need to read and understand Reg 11 of PUWER - dangerous parts of machinery.

Follow the machine guarding hierarchy.

Note that machine guarding is required to the extent 'practicable' NOT 'reasonably practicable'.

This is a higher legal standard.

Guidance as regards machine guarding can be found in BS publication PD5304 (no longer the main guidance, but still useful)

HSG 129? H&S in Engineering Workshops

Training of operators is important, but it is way down the control hierarchy

ExDeeps  
#3 Posted : 02 October 2013 07:55:55(UTC)
Rank: Super forum user
ExDeeps

JJ has it pretty much down pat. If I may make an observation, it would appear that you have been asked to RA this kit with a "solution" already in mind. Do the RA, make recommendations and then engineer a solution to meet the RA recomendations - rejecting solutions before the RA is completed is kind of the wrong way round

Jim
chris.packham  
#4 Posted : 02 October 2013 09:49:03(UTC)
Rank: Super forum user
chris.packham

I would agree with Jim. You have been asked to do a risk assessment, i.e. to establish the risks and potential consequences of operating the machine in its current condition. Your risk assessment can then recommend various control measures so as to prevent an accident (or damage to health) to meet legal/regulatory requirements. It is then up to the person who has the authority to implement such measures to do so or to allow the press to be operated in its current condition to make the decision as to what to do, bearing in mind that this is then his responsibility.

Not knowing exactly your situation, should you have the authority to stop the work, you could then implement some measure to prevent the press being operated until appropriate safety controls are in place.

Chris
Clairel  
#5 Posted : 02 October 2013 09:51:23(UTC)
Rank: Super forum user
Clairel

There are many old press brakes about that don't meet today's standards. Light guards are preferable. I assume this one has nothing in the way of guarding front, sides and rear.

You can use restricted speed as a control measure (you can also use tools set and locked off to 6mm). I think it's 12mm/sec or less with adjustment only possible by a tool setter.

You should also ensure that the sides and rear are inaccessible through fixed or interlocked guards and that operators are trained in safe use.
bluefingers  
#6 Posted : 02 October 2013 18:42:15(UTC)
Rank: Forum user
bluefingers

The option to be able to post pictures on here of the press might have been useful. Thanks for all the responses.
Salis  
#7 Posted : 03 October 2013 09:09:30(UTC)
Rank: Forum user
Salis

Use of pressure pads might also be an option.
johnmurray  
#8 Posted : 03 October 2013 09:49:28(UTC)
Rank: Super forum user
johnmurray

What do your insurers say ?
It is them who will pay.
Restrict flow rate..weird, since hydraulic presses already have a slow action compared to brake presses.
Tell you what, put a workpiece in the press.....leave about 2 metres showing at the front, and bend it. Watch the fast rise of the piece. It is not only the gap betwen the tools you have to consider.
I've seen a guy, doing multiple bends on one workpiece, get thrown across the floor when he forgot about the part that was a foot above the floor at bend start.
That's why light guards are moveable between vertical or horizontal.
And don't allow one guy/gal to position the work with another operating the press.
joebowtell  
#9 Posted : 03 October 2013 10:51:06(UTC)
Rank: New forum user
joebowtell

The others seem to have you covered and I echo what has been said about ensuring the risk assessment process is conducted the right way round as it were.
All that said we have a similar machine (although now guarded) in our shop. The guards are fixed/interlocked to back and sides.. cheap and cheerful to install. At the front we have a foot pedal pressure plate mounted on a plinth along with the 'go' button the plinth has a 'T' shaped bar off the back preventing it being positioned within a set distance of the machine. Foot on the pedal, key in the button, press go and the user cannot be within harms way. Fencing, signage and access control prevent others (hopefully) getting into harms way as well.
Light screens are great but not the be-all and end all.
bluefingers  
#10 Posted : 03 October 2013 11:27:12(UTC)
Rank: Forum user
bluefingers

John Murray
I asked the insurance company to send in an engineer to discuss the issues regarding the machine.
His suggestions were
1. Slow down the vertical speed of the press to below 10mm/sec
2. Cut the top tooling into sections and when setting up the press make sure the top tooling is only slightly wider than the plate to be bent
3. Restrict the use of the machine to a number of operators who are trained and fully aware of the safe working operation of the machine
4. Install side fencing units to exclude any unauthorised access to the moving parts/tooling
5. Install a key switch into the electrical system to lock the machine when not in use
6. Increase the supervision level during the operation periods.
During his visit he also noticed that the control buttons in the pendant were operated by a 440 volt supply from the control board. He recommended that it was converted to 110 Volts.
Thanks for everybody's assistance with this.
SP900308  
#11 Posted : 03 October 2013 12:03:22(UTC)
Rank: Super forum user
SP900308

bluefingers, I can't help thinking from your numerous posts that, with your new company seemably unwilling to 'open the wallet' in pursuit of Health and Safety improvement / compliance, you have a serious uphill task to resolve the number and gravity of issues you've expressed on the forum (in the past week) in such an industry.

Good luck....... little by little!

Out of curiocity, how do your new company's accident stats stack up?
bluefingers  
#12 Posted : 03 October 2013 12:37:23(UTC)
Rank: Forum user
bluefingers

SP900308
Thanks for the reply. I am just scratching the surface so far. I have come to the conclusion that ISO 18001 is far too sophisticated for this company.
I am working on the asbestos register at the minute, and you really just don't want to know about that!
Accident stats, 4 factories, 180 full time workers, 100 agency workers, day shift and night shift, 21 accidents this year, only one reportable. We have ordered 200 first aid dressings and 150 eyewash sachets to replenish stocks so far this year, so something is not happening.
Onwards and all that.....
SP900308  
#13 Posted : 03 October 2013 12:42:43(UTC)
Rank: Super forum user
SP900308

Challenge might 'make' or 'break' you - good luck though!
bluefingers  
#14 Posted : 03 October 2013 13:03:33(UTC)
Rank: Forum user
bluefingers

Defeat is not one of the options available....... thanks for the support.
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