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Actuation & Failure

Actuation & Failure. Presentation Outline . What is an Airstroke ® actuator? Advantages Precautions Airstroke Actuator Selection Procedure Applications. What is an Airstroke ® Actuator?. Firestone air springs are Cylinders!. Cylinder indexing actuator. Click to Play.

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Actuation & Failure

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  1. Actuation & Failure

  2. Presentation Outline • What is an Airstroke® actuator? • Advantages • Precautions • Airstroke Actuator Selection Procedure • Applications

  3. What is an Airstroke® Actuator? Firestone air springs areCylinders!

  4. Cylinder indexing actuator Click to Play

  5. Right angle transfer section Click to Play

  6. Crossover Example You need to lift 1400 kg 100 mm • 50 mm bore hydraulic cylinder with 70 bar • 180 mm bore pneumatic cylinder with 6 bar • Airstroke style 20 with 6,5 bar • 252 mm maximum diameter • 76 mm minimum height

  7. Think Firestone!!!! When someone calls for a cylinder...

  8. WHY?? 80% of industrial air springs sold in North America are used as actuators Firestone air springs generally maintain high gross margins We don’t have a lot of competition so once you sell one, it generally stays sold

  9. WHY?? Our distributors are generally “fluid power” companies, and people call you for “fluid power” solutions to actuation problems Tragically, it is easy to pass up potential Firestone sales because often the persons involved are thinking of the “traditional” solution

  10. Where Should You Start?

  11. Design Parameter Sheets 5 Different sheets, one for each product/application combination • Air spring actuation • Air spring isolation • MarshMellow isolation • AirPicker ID pick and place • AirGripper OD pick and place Check lists for gathering information Communications tool for you, the customer, and Firestone

  12. Literature • Engineering Manual and Design Guide (MEMDG)

  13. Technigram 116 Slide Rule Training Manual page 12 Cylinder Crossover Lists

  14. Advantages of Firestone Airstroke® Actuators

  15. Advantages of Airstroke® actuators Low Cost • When you get back compare a 180 mm bore X 100 mm stroke air cylinder with a Firestone style 20 • Compare hydraulic system to actuate a 50 mm bore X 100 mm stroke hydraulic cylinder

  16. Comparison • Firestone Airbags are more cost effective than most 75 mm bore or higher cylinders • Likelihood that firestone bag will last longer than cylinder • No maintenance cost for Airstroke actuators

  17. Durable Long Life Factory Sealed and Tested Side Loading Capability Compact Starting Height Angular Capability Advantages of Airstroke® actuators

  18. No Maintenance or Lubrication No Internal Rod or Piston Friction Free for Immediate Response Flexible Media Air over Water System for Benefits of Hydraulics Advantages of Airstroke® actuators

  19. Application Examples to Show Advantages • (or WHY DO YOU CARE?)

  20. Dynamometer • Low profile reduces installation expense • Difficult access to actuator - No maintenance or lubrication required

  21. Paper Machinery No Exposed Rod - Corrosive Environment can not damage seals No worry about side load bending of rod

  22. Woodworking Application Debarker • Friction free for immediate response • and able to take vibratory input

  23. Air-over-water lift table Able to use some liquid media Side Load and Angular Capability Low starting height

  24. Oil Drilling Equipment • Angular Capability

  25. Notes about angular capability

  26. Stacking

  27. Advantages of Firestone product line • Wide Size Range • 60 mmto 950 mm diameter • Up to 45 tons of force • Up to 35 cm of stroke

  28. Precautions andWhat happens when you ignore them

  29. Precautions • Positive Stops • Guides • Return Force • Design Envelope • Vacuum • Fail Safe Device

  30. Precautions Always use positive stops

  31. Bottom Out

  32. Over Extension

  33. Without Stops

  34. Precautions • You must guide the movement

  35. Lift & Tilt Table Chain used as a positive up stop on tilt, linkage provides up stop any guides on scissors. Down stops provided by the frame.

  36. Conveyor Application Guides and Stops – Bolts & Nuts

  37. How do you get it to retract? • Gravity • Return Spring • Second Actuator

  38. Paper Application Gravity

  39. Return Spring / Guiding

  40. Return Spring / Guiding • AnotherActuator

  41. Bellows needs space to expand Provide clearance from frame Prevent air lines and cables from contacting surface Design Envelope

  42. Design Envelope

  43. A Quick Note on Vacuum • No!

  44. Vacuum

  45. If an air system failure could cause a pneumatic device to fail in such a way as to create a hazard you need to provide some mechanical means to protect people and other equipment. Failsafe Device

  46. Lift & Tilt Table In this case the tilt mechanism is protected by a damper to lower it safely in case of air system failure

  47. Choosing the right partGathering Information

  48. Selection Procedure • Airstroke Actuator Design Parameter Sheet • Selection Guide • Force Requirements • Stroke Requirements • Individual Static Data Chart • End Closure Options

  49. Selection Procedure Page 103 in the MEMDG

  50. Selection Procedure • Required Information: • Stroke • Force • Minimum and Maximum Height • Diameter • Available Pressure

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