Functional description of the Manipulator For Automatic Tunnel Pickling Line
The manipulators are used to automatically transport wire coils between the individual pickling baths, rinsing baths and storage places.
Every manipulator comprises a level chassis, a lifting beam and a guide roller frame. The lift beam is firmly revved between the lifting and guide roller frame using two wire cables. The height of the jointed fixed-wire point can be adjusted and readjusted.
Forces arising while lifting and lowering the load and the manipulator travel are conducted via the corresponding guide rollers into the surrounding steel frame construction.
The heavy duty guide rollers are ball and roller supported and maintenance free (lifetime lubrication); the adjustments to the lifting beam is continuously adjustable via eccentric bolts and are fixated by self-centring internal chucks.
A stainless steel brush raker is attached to the guide roller frame through a bolt console. The brush rakes have a snowplough contour on both sides and are used to gently align the sealing brushes in the tunnel slot during manipulator travel in both directions and lower themselves again immediately after travelling through, sealing the tunnel slot against pickling fume leakage. Without the brush raker, the sweeping lifting beam with its rectangular contour would cause the brushes to wear out after a short time.
The chassis supports are connected with the manipulator arm through high-strength bolted connections. The chassis support on the energy chain side is equipped with guide rollers that conduct the manipulator cleanly straight on the crane rail.
The crane wheel construction (crane wheel diameter 250mm) is made from maintenance-free wheel blocks that are recessed into the head assembly via bolt connections. The drive side of the wheel blocks are equipped with a spline bushing – the connection to the long-travel drive is made via form closure. The drive is attached to the steel construction via a torque support blade. The entire elevating mechanism motor unit sits on a mechanically machined frame inside the manipulator; attachment via robust bolted connections. Two cable drums that are used to take up the lifting cable are cantilevered bearing-mounted on both drive shafts. The cable drum is elastically connected on the walkway side via a corresponding bearing bell though a drive flange with the drive’s limit switch. The drive switch limits the highest and lowest lifting points and also incorporates the emergency stop functions.
The cable drum supports in the roof of the lifting beam are made using shear pin load cells that are connected with the evaluator in the terminal boxes on the crane bridge. A programmable overload protection unit protects the system from overloads; a likewise programmable slack cable protection detects an unintended lifting beam set down.
Collisions between two adjacent manipulators are prevented by using reflex light barriers with a max. range of up to 8m. If approaches are made outside the permitted program control (malfunction), the travel drives are switched off.
A co-travelling joystick switch takes care of pre-stopping the manipulator travel from the hall end-position (buffer bock). A corresponding switch pin is attached to the crane track at the construction site. That keeps any possible collision forces on the buffer bock construction to a minimum.
Bath-centring detection is implemented through a co-travelling, adjustable inductive sensor. The detection is made lateral to the crane track via the target switch which is to be placed underneath at the construction site.
Work‘s certificate
Manufacturer: AXXIA GmbH, Kran-u.Anlagentechnik
Serial-No. / N ° de serie : 07-6082/1
Year of manufacture : 2007
Designation manipulator for tunnel pickling line
Type of crab: monorail hoist Co. ABUS
Hoisting class: (DIN 15018): H 3
Stress group : (DIN 15018): B 4
Group of mechanism: (FEM/DIN 15020): 3m
SWL Crane: (t): 9,5
Way of hook eff.: (m): 3,7
Span: Crane : (mm): 6.000
Wheel- : Crane : (mm): 250
Number of wheels: Crane : 4
Control: SPS
Supply voltage: (Volt): 400 VAC
Control voltage: (Volt): 24 VDC
Frequency: (Hz[c/s]): 50
