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Durability testing of car seat heaters |
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| Starting point / Task definition |
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| For car seat heaters, technical perfection is not enough; they must also always satisfy customer requirements, no matter which type of seat the heater is installed in. Therefore the basic materials and system components used for the seat heaters must be tested continuously and optimized in accordance with the test results. Standard qualification testing includes the mechanical durability test series required by the automotive industry. |
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| Implementation / Solution |
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 | | Durability testing of car seat heaters |  |
W.E.T. Automotive Systems AG, based in Odelzhausen near Munich, one of the world’s leading manufacturers of car seat heaters, carries out durability testing using the Occubot VI process. Here a KUKA KR 150 robot verifies whether or not heaters integrated into car seats or seat parts withstand the mechanical stress which they are subjected to during the lifetime of the car. Occubot VI is a flexible, programmable, load- and position-controlled test system with high repeatability. This method, which works with force/torque sensors, reproduces the motions and loads of a human body using dummies, thus replacing a wide range of costly, customized test devices with hydraulic or pneumatic drives. Occubot VI allows realistic simulation, for example, of someone getting into and out of the seat (ingress/egress test), or of strong pulsation or vibration during driving. In addition, there are jounce and squirm, rear fatigue, truck driver and clutch operation tests.
The measuring system provides six measurement dimensions for forces and torques and ensures absolute accuracy. This provides the user with data about the actual forces and torques being exerted on the contact surface between the dummy and the seat. It is possible to compensate for the static forces of the dummy itself in order to prevent them from giving rise to additional dynamic forces. The robot motions are also regularly adjusted in relation to the wear on the test object. And to adapt the overall system to a different seat, it is merely necessary to redefine the Base coordinate system. |
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| System components / Scope of supply |
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- KUKA KR 150 robot
- PC-based KUKA KR C2 robot controller, including control panel with Windows interface
- Force-torque sensor system
- System software, including the application, setup and configuration programs
- Various dummies
- Robot programming
- Commissioning
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| Results / Success |
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- Flexibility
The flexibility of the process installed at W.E.T. Automotive Systems resulting from the use of a six-axis jointed-arm robot makes it possible to configure the system for combined operation with three different tests on three different seats at the same time. This means, for example, that the robot can complete one program at night and then switch automatically to the next program. Another example of the flexibility of the KR 150 is that when the heater in a seat being tested ceases to function, the robot automatically moves on to the next seat and resumes testing there.
- User-friendliness
Basic knowledge of programming is sufficient as the system software is embedded in the robot programming. Another factor contributing to the overall user-friendliness is the fact that, after a stop, the robot can always resume motion at exactly the point where it stopped. |
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| Industry |
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| Automotive suppliers |
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| Application |
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Handling, loading and unloading Measuring, testing and inspection |
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| Customer |
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W.E.T. Automotive Systems AG, Odelzhausen, Deutschland |
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