Engineering Specification, 3900 ton Hydraulic Plate Stretching Machine (O/No. 62020)

3900 ton Hydraulic Plate Stretching Machine (O/No. 62020)

This page contains a précis of the Engineering Specification for the machine stated above (as originally supplied).

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Process:Stretching Aluminium Plates between the following sizes: –
Finished Plate Length:50′ 0″ maximum (as supplied)
Plate width:10′ 8″ maximum
Plate thickness:7″ maximum, 0.119″ minimum
Construction:Horizontal type with two gripping crossheads located on a fabricated steel bedplate
Main Characteristics:Number of main rams2
Maximum power3900 tonf (English)
Stroke of main ram9′ 0″
Maximum width of jaws10′ 8″
Maximum jaw opening (all jaws)11″ for sections 10″ thick
Tail crosshead adjustment3′ 8 1/2″
Width of centre grip2′ 1 1/2″
Maximum load available on centre grip3900 tonf
Working pressure4480 psi
Pressure Medium:High grade mineral oil (Mobil DTE special)
Lubrication:Motorised and Hand Gun
Tanks:Main – 2000 gallons, heated by 3 – 5 KW heaters
Cylinder End – 200 gallons, heated by 1 – 3 KW heater
Tail End – 400 gallons, heated by 2 – 2 KW heaters
Recovery – 200 gallons, heated by 1 – 2 KW heater
Pump Units:Towler manufacture
Installed Horsepower:571 HP
Controls:Servo operated, balanced valves, the main ram controls are mounted on a desk and the controls for the grips are mounted on the respective crossheads
Speeds:Maximum stretching speed0.27 in/sec
Approach speed3.73 in/sec
Return speed3.73 in/sec
Electrical Supply:380 volts, 3 phase, 50 Hz

This specification was kindly provided by Rhodes Interform

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