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IMPULSE TOOLS. NON SHUT OFF & SHUT OFF MODELS PRODUCT LAUNCH. WHAT IS AN IMPULSE TOOL?. The CP impulse tool is a tightening tool. It contains a hydraulic pulse unit driven by a pneumatic motor. The pulse is very short and feels smooth to the operator when the tool is in operation.
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IMPULSE TOOLS NON SHUT OFF & SHUT OFF MODELSPRODUCT LAUNCH
WHAT IS AN IMPULSE TOOL? The CP impulse tool is a tightening tool. It contains a hydraulic pulse unit driven by a pneumatic motor. The pulse is very short and feels smooth to the operator when the tool is in operation.
ADVANTAGES OF AN IMPULSE TOOL • An impulse tool is FAST • An impulse tool is ACCURATE • An impulse tool is COMFORTABLE • An impulse tool is QUIET
WHERE TO USE AN IMPULSE TOOL - MARKETS Appliance MVI Components General Engineering
TYPICAL APPLICATIONS • Long Bolts : • Adjustable feet on large household appliances (ovens, washing machines, refrigerators) • Improves cycle time over screwdrivers • Less noise and vibration than impact tools • Rotating Parts : • Fans in ovens and microwave ovens, single nuts on wheel spindles, lawnmower blades • High speed and frequency of impulses prevent the assembly from rotating • Reduction in application cost as no fixturing is required • Soft Joints : • Clamp rings on washing machine drums, alternator and electric motor assembly, brake caliper assembly, any assembly with gaskets and/or seals • Inertia of tool overcomes compression of the joint without torque reaction being transmitted to the operator
WHY USE AN IMPULSE TOOL? Consider an impulse tool in place of an impact wrench or ratchet screwdriver for: • High speed – to improve productivity • Wide torque range – various tools for various applications • Longer life than impact tools – lower cost over the long run • Torque accuracy – better joints, improved quality, joint consistency among operators, less rework • Low reaction forces – less impact on the operator; prevents medical expenses, avoid legal action • High torque output to weight ratio – lighter tools for operator • Low noise and vibration levels – better work environment
WHY USE AN IMPULSE TOOL • Torque accuracy and repeatability • The longer an impact tool is left operating the more the torque will increase whereas the impulse tool torque will level off at the pre-set value.
Torque IMPULSE TOOLS Time sec IMPULSE TOOLS vs IMPACT WRENCHES
COMPARISON SHUT OFF VS NON SHUT OFF TOOLS
SHUT OFF VS NON SHUT OFF IMPULSE TOOLS • Use shut off tools to: • Eliminate operator influence on the fastening cycle, improving repeatability • Reduce operating time. • Lessen air consumption. • Reduce the amount of time the operator is exposed to vibration and noise, minimising operator fatigue.
OK NOK 4 Bolts Plate Gasket or Seal OK NOK SHUT OFF VS NON SHUT OFF IMPULSE TOOLS Do not use shut off impulse tools on applications where a number of screws are used to tighten an assembly with a thick seal or gasket or on prevailing torque applications All bolts tightened to torque but clamping force not consistent across the joint as tool shuts off at torque. Use non shut off impulse or EB brushless systems or a multi unit with pneumatic/electric torque motors.
Clamping Force Target Value Non Shut Off Shut Off Non Shut off can be used until joint is compressed. Shut off point in relation to clamping force is variable depending on the joint variation, oil temperature. Time SHUT OFF VS NON SHUT OFF IMPULSE TOOLS
SOME RULES • Rules When Using an Impulse Tool • The tool should be run until the shut off occurs • The tool should always pulse for 3 to 5 pulses to provide consistency • If the tightening cycle is greater than 3 to 5 seconds then a larger capacity tool should be considered • Always specify a tool with a higher maximum torque than the torque required on soft joints • Worn sockets and extensions should be replaced to avoid vibration, a loss in torque output, accuracy and damage to the output drive • Static torque wrench measurements should be made to verify torque
TORQUE vs WEIGHT RATIO Torque vs Weight Ratio = Max Torque / Weight Better Weight / Ratio = Less stress for the operator
HEALTH REPORT “The impact of Repetitive Stress Injuries (RSIs) is rising. The Bureau of Labor Statistics says that 25% of all injuries that result in lost work time are due to repetitive stress problems. Repetitive strain injuries, which technically compromise more than 100 different types of job induced injuries resulting from wear & tear on the body, cost employers $20 billion a year in workers compensation claims. The government estimates an additional $80 billion is lost in related costs, such as absenteeism and reduced productivity.” “The problem of repetitive stress injuries is huge. It costs employers billions of dollars, and it causes untold pain and suffering of workers,” says Joseph Dear, head of OSHA (Occupational Safety and Health Administration). “This is an issue that requires serious governmental action. Certainly when so may workers are affected, the government can’t stand by.” Source: January 9th 1997 - USA today report on joint conference by the Occupational Safety and Health Administration (OSHA) & the National Institute for Occupational Safety and Health (NIOSH).
HEALTH REPORT “WASHINGTON - the government moves forward with plans to impose a national ergonomic standard for employers …” “OSHA Administrator Charles Jeffress concedes the new ergonomic standards would require a ‘significant investment by American business.’ But those costs are small, he said, when compared with the medical and business costs associated with work related injuries: $15 billion to $20 billion a year, he says.” Business groups and their allies in Congress are seeking to block this plan, but it nevertheless represents another increase in the profile of ergonomics as a major issue in USA industry today. Source: The Wall Street Journal. Monday, February 22, 1999