MQJM CNC Machining: Advanced Methods for Precision Dimensional Inspection

In MQJM's high precision CNC machining services, dimensional accuracy is a critical standard for evaluating the quality of parts. Even minor deviations can lead to assembly failures, functional issues, or product rejection. To ensure the highest quality of every part, MQJM strictly controls the measurement of dimensions by employing a variety of advanced precision measurement tools and methods, guaranteeing the accuracy and consistency of the machined components. The commonly used dimensional accuracy measurement methods at MQJM include:

1.Vernier Calipers / Digital Calipers

This is the most basic and widely used measurement tool, suitable for measuring length, width, diameter, and other external dimensions. MQJM uses high-precision digital calipers for quick inspections, typically achieving an accuracy of ±0.02mm to ensure parts meet design specifications.

2. Micrometers

Micrometers provide higher precision measurements and are suitable for detecting shafts, external diameters, or small-sized parts. MQJM employs various types of micrometers such as outside, inside, and depth micrometers, with typical measurement accuracy around ±0.01mm, strictly controlling critical dimensions.

3. Height Gauges and Surface Plates

Using granite surface plates combined with height gauges, MQJM measures part heights and height differences of holes. This method, paired with scribers or digital indicators, improves inspection efficiency and ensures uniformity in batch measurements.

4. Coordinate Measuring Machines (CMM)

CMMs are indispensable high-precision measurement devices in MQJM's China CNC custom machining. They are ideal for inspecting complex geometric shapes and multiple tolerance requirements. Measurement errors can be controlled at the micron level. MQJM utilizes CMMs to rigorously control part dimensions, positions, parallelism, perpendicularity, and more.

5. Vision Measuring Systems / Optical Projectors

MQJM also uses vision measuring systems for non-contact measurement, especially suitable for measuring contours, hole diameters, and chamfers of thin and precise parts. These systems quickly capture images of workpieces and analyze data via software, enhancing both accuracy and efficiency.

6. Go / No-Go Gauges and Thread Gauges

For features like hole diameters, shaft diameters, and threads with clear tolerance limits, MQJM employs go/no-go gauges and thread gauges for rapid inspection, ensuring parts meet mass production standards.

Conclusion

Dimensional measurement is a core step in MQJM's high precision CNC machining services  to guarantee part quality. By applying scientific measurement methods and strict dimensional control, MQJM ensures that every product achieves high precision and superior quality, meeting diverse and stringent customer requirements.