RovD Engineering - Rollerbeds, conveyors, transfer shuttles and elevators for automotive / agricultural industries

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Rollerbed conveyors

Rollerbed categories

Bodyshop rollerbeds
Pre-treatment rollerbeds
Paintshop rollerbeds
Assembly Hall rollerbeds

Typical options

Drive train simplex chain
Drive train synchronous belt (drive ends urethane)
Pipe rollers
External stub rollers (steel or urethane)
Conveying speeds 25 – 35 m/min
Bodyshop long members & covers – steel & steel
Paintshop long members & covers – aluminium & galvanized sheets
Pre-treatment & covers – steel & stainless
Available with proximity sensor brackets and isolators fitted

Synchronous belts vs transmission chain

Synchronous belts, are preferred in paintshop environments
Synchronous belts require no lubrication and operate at reduced noise levels
Synchronous belts are more efficient and have higher operation speeds than conventional drive trains
RovD use the international HTD synchronous profiles

Pre-treatment rollerbeds

Pre-treatment rollerbeds are specifically designed to cope with high temperatures and the ‘e-coat’ environment. Covers are made of stainless steel and capped to facilitate run off of fluid.

Goods lifts & scissor lifts

Goods hoist – belt drives

The hoisting belts are purpose manufactured for hoisting applications
Kevlar reinforced belts allow for reduced drive drum diameters
Lift strokes for ‘BIW’ and painted vehicles up to 13,5 meters are achievable
Lifting capacities (SWL) up to 1500 kg are achievable
Hoisting velocities are between 25m/min and 35 m/min
Hoisting power used is typically 5.0 kW, standby drive units can be mounted at either end of the drive shaft, thereby reducing change over times
All hoisting safety devices are built-in to design inclusive of; slack belt, over load, over travels
Maintenance access and platform are integrally designed around the hoisting frame

Goods hoist – chain drives

Chain drives reduce flexibility when hoist loads exceed 1500 kg
Chain drives are preferred in applications where positive up and downward drive is required
1,5” and 2” simplex transmission chain is used with hoist power of 4.0 kW
In high temperature applications (A-ovens) specific bearings in combination with lubrication systems are used

Scissors lifter – ball screw drive

Ball screw drive allows for very accurate strokes controlled via ‘variable speed drive’ as well as ‘DOL’
Lifting capacities up to 2500 kg are achievable. •Lifting strokes up to 1200 mm are achievable with base dimensions of 6000 mm
The double scissors creates a very stable platform, suitable for process functions and access
Anti-collapse and anti-pinch safeties are built-in features
The ball screw design is particularly suited to ‘paintshop’ environments and engine fitted

Skid change hoist

The skid change hoist is designed with polyester lifting belts
This system interchanges bodyshop skid with paintshop skids, and is capable of dealing multi-derivative skids
Skid positioning is via ‘over-centre’ clamping pairs per skid
Strokes up to 1000 mm are achievable to clear skid tooling
Drive into and out of the system is controlled by change pole motors or Variable speed drives pending on the cycle requirements
The system is designed around high duty cycles in excess of 200 changes per day

Transfer Shuttles

Side transfer shuttles

Side transfer shuttles are driven via direct shaft drives, chain drives or belt drives
Transfer velocities up to 120 m/min are achievable
Positional location is via binary flags mounted off the floor rails
Floors rails are 60 mm AFL if not imbedded. Rails are 100 mm wide
Transfer wheelblocks are coated with urethane to improve drive and braking and to reduce travel noise
Shuttles can operate over distances of 100 meters via optical data links

Turntables & pivot stations

Turntable notes

Turntable rotation is via a direct drive wheelblock positioned at right-angles to the circular track
Wheelblocks are crowned to reduce rail scuffing360 degree rotation is achievable
Min transfer height for Transfer turntables is 500 mm AFL without civils
Full rotations are achievable within 8 seconds
Mechanical stoppers are integrally designed into the turn-table in hoist and/or mezzanine floor applications

Chain conveyors & Belt conveyors

Side transfer chain buffer

The chain drive is used to index the buffer
The travelling pop-up is used to shuffle the buffer
The static pop-up unit is to eject the units out onto the production line
For buffers in excess of twelve units, multiple travelling pop-ups can be used to achieve cycle times.
For shorter buffers the index function of the chain can be omitted, leaving the travelling pop-ups to place units on stands and shuffle the buffer.