Wire harness assembly supporting structural process requirements

The process database is the basis of the automotive wiring harness assembly system. It not only stores the structural information and process information of each wire harness product but also provides basic data such as raw material information, process methods and process parameters for the system description product information and process decision.

For the withstand voltage test, when a high voltage is applied to a circuit, the system terminates the circuit and performs grounding treatment. Each loop is tested one by one. If there is only one loop in the test system, the system ground is automatically tested for high voltage. The withstand voltage test has two methods: normal test and fast test. The normal test is used for the distributed capacitance and capacitive device in the circuit. The cable tester is the platform for completing the system integrated wiring test, and the complex wire harness assembly system must be realized. For integrated wiring testing, an additional test interface adapter is required to complete the interface between the tester interface and the device under test.

The software runs in the real-time multi-tasking operating system environment, making full use of the functions provided by real-time multi-task management, inter-task communication and synchronization services, and interrupt management, and runs in the same system concurrently with a set of closely coordinated processes.

The carrying system consists of a carrying platform and a conformal jig. The conformal jig of the automotive electrical appliance is mounted on the carrying platform to be designed, and is excited by the excitation platform connected to the carrying platform. The vibration table is used as an excitation source by the Lupu signal to simulate the vibration condition of the vehicle under different road conditions and in the exercise state, thereby providing a test environment for the electrical system mounted on the bearing platform, and the entire inspection system framework. From the perspective of providing an experimental environment for the test, it is required that the entire test load-bearing platform and the accompanying conformal clamp simulate the installation state of the tested electrical appliance in the vehicle as much as possible, which is the geometry of the bearing platform during the assembly process of the wire harness. Size requirements.

The outer diameter of the wire harness depends mainly on two factors: the extrusion flow rate of the plastic and the main traction speed of the system. When the system is running stable, the main traction speed reaches the set value, and the outer diameter depends only on the extrusion flow rate of the plastic, the flow rate increases, the outer diameter increases, and the outer diameter decreases. The speed of the extruder screw is adjusted during the system's variable speed operation to change the plastic flow rate to maintain the wire diameter. When the extrusion flow rate is constant, the traction speed is increased, and the outer diameter of the wire harness assembly product is decreased; otherwise, the outer diameter is increased. The extrusion flow rate of the plastic is determined by the screw speed and the structure of the extrusion equipment. The extrusion equipment is similar to a heating furnace device, which can be equivalent to the first-order inertia plus pure lag link. The screw speed control system is DC closed-loop speed regulation, and the model can be equivalent to the second-order inertia link.