UBC International Training Fund. Presents. Millwright Training Program. FOR TURBINE ASSEMBLY AND GENERAL INDUSTRIAL BOLTING. PRESENTED IN COOPERATION WITH HYTORC.
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FOR TURBINE ASSEMBLY
AND GENERAL INDUSTRIAL BOLTING
PRESENTED IN COOPERATION WITH HYTORC
The following material is intended to make you awareof the currently acceptable and recognized methods of performing the tasks described in this presentation. However, every possible application of these methods cannot be foreseen and the following material is not designed to cover every potential application. Therefore, you must always follow all current procedures and safety regulations whenever you perform any of the tasks discussed in this presentation.
THE WORLD’S LARGEST MAKER
OF HYDRAULIC BOLTING TOOLS
ALWAYS A FEW REVOLUTIONS AHEAD!
In every industry - wherever there is a bolting challenge!
EVERY INVESTMENT MUST PAY FOR ITSELF..
HYTORC PAYS BACK BIGTIME!!
To Help You -
1. Increase Your ValueIn The Workplace Because Of Your Skills
2. Increase Your Job Satisfaction As A Professional
3. Become A Safer Worker
Give Me These Tools,
And I Will Give You
The Results You Want.
BUT YOU CAN MAKE A DIFFERENCE!
AT ITS HEART,
HOLDING EVERYTHING TOGETHER IS
THE HUMBLE LITTLE BOLT
LET ME INTRODUCE YOU TO
Unlike A Pin Or A Clip -
A Bolt Holds Surfaces Together
A BOLT IS A SPRING
IT SQUEEZES THE JOINT TOGETHER
To Hold The Joint Together - But Not Too
Much Stretch So That That The Bolt Yields -
Or No Longer Springs Back
TIGHTER IS NOT ALWAYS BETTER!!
WE CALL THIS
ON THIS FLANGE
24BOLTS@58,000 Lbs. PER BOLT
TOTAL PRE-LOAD 1,392,000 Lbs.
MUST BE GREATER
THAN THE PRESSURES TRYING TO ESCAPE
Let’s Briefly Examine The Ways Each Of
These Is Done And Their Relative
Advantages And Problems
TORQUE= ANGULAR MOMENTUM (CIRCULAR FORCE)
usually measured in foot/pounds
(sometimes also in newton/meters or kilogram/meters)
FOOT/POUND= A TORQUE OF 1 POUND AT A DISTANCE
OF 1 FOOT FROM THE CENTER
you can double the torque by doubling either
the force or the distance
If you want more torque…
Get a bigger hammer or a longer lever!
To Measure How Much Pre-load Is Developed
Per Unit Of Torque Applied To Any Given Bolt
CHANGEWEIGHT OR DISTANCE AND YOU CHANGE LOAD
In Bolting We Are Interested In
Pre-load Or Clamping Force Not Torque.
(But Since Load Is Difficult To Measure We
Measure Torque As Away To Approximate Load)
1. It Is Relatively Easy To Measure
2. Even Torque Means Even Load
The Consistency Of Load
From Bolt To Bolt…
Is Often More Important
Than How Tight The
HAVE COME UP WITH SOME VERY CREATIVE WAYS
OF TIGHTENING THEM
(An Accident Waiting To Happen)
Oh, My Aching Back!!
Watch Out Below!!
Noise And Vibration
Fast Run-down But Fizzle At The End
How Tight Is Tight??
But None Of These
Of Guessing At Load When Using These Tools
We Can Measure The Forces With Great
1. Each Bolt Will Be Exactly Tight Enough
And What Is More Important-
2. Evenly Tight With Its Neighbors