Auto parts testing
The automobile is a complex electromechanical hybrid system composed of tens of thousands of parts. There are many kinds of parts, but each plays its own role in the whole automobile. Under normal circumstances, auto parts manufacturers need to test parts after the production of products, in order to ensure the reliability of product quality. Car manufacturers also need to test the matching performance of parts installed into the vehicle. Today, we introduce the relevant knowledge of auto parts testing to you:
Auto parts are mainly composed of auto steering parts, auto walking parts, auto electrical instrumentation parts, auto lamps, auto modification parts, engine parts, transmission parts, brake parts and other eight parts.
1. Auto steering parts: kingpin, steering machine, steering knuckle, ball pin
2. Car walking parts: rear axle, air suspension system, balance block, steel plate
3. Automotive electrical instrumentation components: sensors, automotive lamps, spark plugs, batteries
4. Car lamps: decorative lights, anti-fog lights, ceiling lights, headlights, searchlights
5. Car modification parts: tire pump, car top box, car top frame, electric winch
6. Engine parts: engine, engine assembly, throttle body, cylinder body, tightening wheel
7. Transmission parts: clutch, transmission, shift lever assembly, reducer, magnetic material
8. Brake components: brake master pump, brake sub-pump, brake assembly, brake pedal assembly, compressor, brake disc, brake drum
Auto parts testing projects are mainly composed of metal material parts testing projects and polymer materials parts testing projects.
First, the main testing items of automotive metal materials parts are:
1. Mechanical properties test: tensile test, bending test, hardness test, impact test
2. Component testing: qualitative and quantitative analysis of components, analysis of trace elements
3. Structural analysis: metallographic analysis, non-destructive testing, plating analysis
4. Dimension measurement: coordinate measurement, projector measurement, precision caliper measurement
Second, the main testing items of automotive polymer materials parts are:
1. Physical properties test: tensile test (including room temperature and high and low temperature), bending test (including room temperature and high and low temperature), impact test (including room temperature and high and low temperature), hardness, fog degree, tear strength
2. Thermal performance test: glass transition temperature, melting index, Vica temperature softening point, low temperature embrittlement temperature, melting point, coefficient of thermal expansion, coefficient of heat conduction
3. Rubber and plastic electrical performance test: surface resistance, dielectric constant, dielectric loss, dielectric strength, volume resistivity, resistance voltage, breakdown voltage
4.Combustion performance test: vertical combustion test, horizontal combustion test, 45° Angle combustion test, FFVSS 302, ISO 3975 and other standards
5. Qualitative analysis of material composition: Fourier infrared spectroscopy, etc
