A CASE FOR SHORT STROKE, FLUID POWER CYLINDERS
WITH THICK WALLS
- ADAPTIVE AUTOMATION ACTUATORS-
-PART 3-
MANUFACTURERS OF FLUID POWER CYLINDERS NORMALLY
USE RELATIVELY THIN WALLED TUBING DESIGNED TO BARLOW'S EQUATION
WITH APPROPRIATE SAFETY FACTORS. PORTS ARE MACHINED INTO END
CAPS TO SUPPLY
PRESSURE TO EITHER SIDE OF A PISTON. END CAPS ARE HELD WITH LONG
TIE RODS AND THE USER THEN ATTACHES FITTINGS AND FLUID LINES
TO EACH PORT. AN INSTALLATION SUCH AS THIS IS SATISFACTORY AND
IS COMMON
WHERE SPACE IS NOT LIMITED. HOWEVER, WE HAVE ALL SEEN CYLINDER
INSTALLATIONS WHERE FEED LINES & FITTINGS TAKE UP MORE SPACE
IN THE WORK ZONE THAN SPACE OCCUPIED BY THE CYLINDER AND IN SOME
CASES,
FEED LINES ARE EXPOSED TO ACCIDENTAL DAMAGE AND ACCUMULATION
OF WORK DEBRIS FROM PROCESSING.
IN MOST CYLINDER APPLICATIONS, INPUT PRESSURE AND THE DESIRED
OUTPUT THRUST ARE KNOWN FROM THE START. INTERNAL CONFIGURATION
IS THEN EASILY DETERMINED SINCE THRUST IS A FUNCTION OF NET PISTON
AREA AND APPLIED PRESSURE. ONCE INTERNAL DIMENSIONS ARE KNOWN,
THERE IS LITTLE LEFT IN THE WAY OF CHOICES EXCEPT FOR EXTERNAL
CONSIDERATIONS.
EXAMPLES OF MOUNTING WITH COVER-PLATES USING BOLT PATTERN DESIGN
ARE SHOWN.
