Wiring harness processing drawing design skills

Harness processing engineering team in the customer drawing design, mainly contains: product size chart, product BOM details and dosage, product mechanical properties of raw materials and physical properties. Harness processing mechanical properties and physical properties mainly include the number of bending of raw materials, terminal tension test and the resistance value of raw materials. Wire processing drawing design wire impedance is mainly based on the conductor and insulator resistivity, cross-sectional area and length have a relationship, according to the law of resistance R = ΡL / S accounting for insulation impedance and conduction impedance. 1. wire material is generally divided into bare copper and tinned copper wire, according to the constant temperature of 20 ℃, the resistivity of the bare copper is 0.0178Ω * mm ² / m, the resistivity of the tinned copper wire is 0.0172Ω * mm ² / m. 2. /m.2. Wire outer being generally PVC material, resistivity of 108Ω * m. 3. According to customer demand wire processing conductor area calculated wire conductive impedance and insulation impedance. 4. Terminal harness technical team in the process of design drawings must be clear about the pulling force of the terminals. 5.

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