Sorion developed a cost effective yet fully functional door test unit for Land Rover to use on the Freelander door assembly lines.
The door test units are based on Sorion's experience of producing Assembly aids and is extended into an compact but yet effective sub assembly test unit.
Each test unit tests the door or doors from one side of the Freelander. The unit capable of testing left and right hand drivers doors (both 3 and 5 door versions), front and rear passenger doors. Sorion's engineering analysis of the door design has significantly reduced the interconnection count and the overall test complexity, saving Land Rover both financially in the initial capital investment and the ongoing man power requirements.
Testing of a pair of door typical takes less that 60 seconds including connection / disconnection, manual inspection and the electrical function tests.
The door test unit carries out the following functions;
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Electric mirror movements |
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Heater mirror current draw |
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Power fold mirror movements |
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Front window lift / lower |
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Rear window lift / lower |
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Front and rear door speaker test |
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Front door central locking test |
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Rear door central locking test |
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Lock mechanism key and latch status |
The Central locking tests are fully microprocessor controlled and are carried out in a matter of seconds without operator intervention.
The speakers are tested (again under microprocessor control) for correct connection of base/mid range unit and tweeter. The test is carried out using induction measurements against tightly defined limits. The test is carried out almost instantaneously without producing any sound.
The unit is suspended from an overhead catenary system (also providing the 12 volts supply) that allows the unit to travel with the doors as they are tested.
The total project from order placement to delivery of the first unit was 6 weeks, including the provision of the test harnesses and bespoke DuraconTM ruggedised connectors.
Sorion
Magreal Industrial Estate
Freeth Street
Ladywood
Birmingham
B16 0QZ