1958 Hufford A12 — UMS record #13520
STRETCH FORMING MACHINES, SHEET, WRAP & PLATE
Historical UMS record #13520
Specifications
CAPACITY
Tonnage59 TONS
Tension Cylinder Pull, Maximum118,000 Lbs.
Tension Cylinder Pull, Minimum11,800 Lbs.
HD5 - 4" Circular Opening246"
HD8 - 6" Circular Opening238"
HP9 - 8" Circular Opening237"
20" Sheet Jaws236"
Equipped w/Straight Sheet Jaws20"
Minumum Die Length For 180 Deg. Bend20"
Maximum Die Length For 180 Deg. Bend At Full Tonna72"
Maximum Die Depth w/Die Back-Up Plates28"
Minimum Die Depth w/Die Back-Up Plates7"
DIE MOUNTING TABLE
Table Dimensions: D X W50" x 84"
MACHINE SPEEDS
Tension Cylinder Extends (30" Stroke)35 SECONDS
Tenision Cylinder Retracts (30" Stroke)26 SECONDS
Arms Move Back (107 Degree)29 SECONDS
Arms Move Forward (107 Degree)10 SECONDS
DIMENSIONS
Widith (Standard Arm)388-1/2"
Depth (Arm Forward)267-1/2"
Height76"
Weight, Approx. (w/attachments)39,000 LBS
Equipped With
Table Contains 76 Uniformly Spaced Tapped Holes & Complementary
Keyways To Permit The Mounting Of Either Die Holding Pin Assemblies
Or Die Back-Up Plates
MACHINE MOVEMENTS:
Each Arm Movement Is Independently Actuated By A Separte
Hyd. Clinder & Indepently Controlled. Each Arm Rotates About A
Fixed Pivot From 17 Degrees Forward To 90 Degrees.
Each Tension Cylinder Is Adjustable Along Its Arm In 7" Increments
& Is Positioned By Means Of An Electric Motor-Speed Reducer-Lead
Screw Mechanism.
Each Tension Cylinder Is Free To Swivel In Its Bracket About A
Vertical Axis 25 Degrees Each Side Of The Arm Centerline.
POWER UNIT:
Electrical Motor, Horsepowe/RPM: 25 HP/1200 RPM
For Diving (1) 2-Stage Hyd. Pump For The Operation Of Tension
Cylinder Circuit & (1) 2-Pressure Hyd. Pump For the Jaw Circuit
Electrical Motor, Horsepower/RPM: 40 HP/1200 RPM
For Driving (2) 2-Stage Hyd. Pumps For The Operation Of The
Arm Actuating Cylinder Circuit.
CONTROLS:
All Functions Of The Press Are Push-Button Controlled.
(1) Solenoid Operated Selector Valve For Each Tension Cylinder
(1) Solenoid Operated Selector Valve For Each Actuating Cylinder
Separate Manual Adjustments Are Provided To Regulate The Speed
Of Travel Of Each Arm. Solenoid Operated Selector Valve Provide
For Opening & Closing The Gripper Jaws.
Operation Of The Initial Wrap Pressure Setting & Final Stretch
Pressure Setting Is Controlled By Separate Push-Button Stations.
Desired Pressure Settings Are Established By Means Of
Adjustable Hyd. Relief Valves Mounted On The Panel
A Hyd. Pressure Gauge Located On The Left Hand Tension
Cylinder Head Accurately Indicates The Pulling Pressure All All Times