As a core component of the motor's electrical connection system, the motor nozzle (also known as a terminal block or lead-in interface) performs three key functions: conducting electricity, providing mechanical connections, and protecting against insulation. Its performance directly affects the motor's reliability, safety, and lifespan. Today, we will explore six core inspection procedures to reveal how a 100% full inspection ensures that each motor nozzle leaves the factory with 'zero defects.'
Test one
inspection of appearance
-- Visible quality screening
The inspector holds the wire end and rotates the motor wire end under a standard light source for inspection. The focus is on identifying surface cracks, burrs, and oxidation spots. Auxiliary tools include a 5-10x magnifying glass for detecting fine scratches and a strong flashlight for observing the surface flatness from the side, which helps to quickly rule out visible defects and ensure a solid quality foundation.
Test 2
Inner hole inspection
-- Internal control with millimeter accuracy
Rapid gauge verification: Custom 'over-end' and 'stop-end' gauges are used to determine the inner hole size within 1 second. The over-end (minimum limit dimension) must fit smoothly, while the stop-end (maximum limit dimension) must not enter. All marked dimensions must fall within the design tolerance band, ensuring 100% pass rate for the gauge inspection.
Test three
Surface roughness inspection
-- Surface precision control at micron level
According to the specific requirements of customer's drawings, the surface roughness measuring instrument is used for professional measurement and comparison with standard samples. Abnormal data are manually verified to ensure the accuracy of the detection. The roughness of the inner hole and contact surface meets the requirements of the design drawings and there is no over limit.
Test four
Shape detection
-- High precision restoration of contour shape
High-precision profile meter and image meter are used to measure each motor nozzle to ensure that the actual shape deviation is within the tolerance range required by customers, verify that the overall geometric shape of the motor nozzle is 100% consistent with the design drawing, and eliminate assembly interference.
Test five
Size inspection
-- Strict control of millimeter tolerance
Use micrometer and vernier caliper to detect the total length, flat (middle) thickness, small outer diameter length of the motor nozzle, and the specific tolerance shall be strictly in accordance with the requirements of customer drawings.
Test six
Qualified motor line nozzle is packed
-- Last guard from detection to delivery
After wiping the qualified motor nozzle, protective packaging is carried out, and it is put into an anti-static packaging bag. Inspection qualified
label is attached, indicating the batch number, ensuring that the packaging is complete without damage and the protective measures are in place.
From the exterior to the inner holes, from roughness to dimensions, we have established a comprehensive quality defense system that covers both visible and invisible aspects through six major processes, over 20 core inspection items, and 100% full inspections. Each wire end must pass through rigorous screening by three inspectors and five precision devices, ensuring zero missed inspections and zero concessions. This not only controls quality risks but also fulfills our commitment to delivering 'zero defects' to customers -- making every motor wire end a reliable starting point for connections.