yueyiprecision

Comprehensive CNC Machining Quality Control for Precision Manufacturing

At Yueyi Precision, quality is not a department — it’s a culture. Our CNC Machining Quality Control system is built around a structured CNC Quality Assurance Process that ensures every component meets or exceeds your specifications, from raw material receipt to final shipment. Certified to ISO 9001, ISO 13485, and IATF 16949 standards, we implement a proactive quality management approach that prevents defects rather than detecting them after the fact.

  • ISO 9001:2015
  • ISO 13485:2016
  • IATF 16949
System_Ready

±0.005mm

Resolution Accuracy

Our Quality Certifications & Standards

We understand that in product development, time and quality are critical. As your manufacturing partner, we operate as an ISO Certified CNC Manufacturer committed to delivering consistent quality, traceability, and compliance across every production stage.

Certification Standard Scope Certification Body Valid Until
ISO 9001:2015 Quality Management Systems All Manufacturing Processes TÜV SÜD 2026-08-15
ISO 13485:2016 Medical Devices Quality Management Medical Component Manufacturing BSI Group 2025-11-30
IATF 16949:2016 Automotive Quality Management Automotive Parts Production TÜV Rheinland 2026-03-20
End-to-End Validation

Integrated Quality Control Process Flow

PHASE 1

Incoming Quality Control (IQC)

Every batch of raw material undergoes strict verification before entering production. Our incoming material process includes full documentation review, physical verification, and controlled storage procedures as part of our Precision CNC Inspection standards, ensuring only qualified materials are used in your components.

Step 1: Documentation Review

  • Material Certificates (Mill Certs)
  • Chemical Composition Analysis Reports
  • Heat Treatment Certificates
  • Full Traceability Documentation

Step 2: Physical Verification

  • Spectrochemical Analysis (XRF)
  • Hardness Testing (Rockwell, Brinell, Vickers)
  • Dimensional Verification of Stock
  • Surface Condition Inspection

Step 3: Material Segregation & Storage

  • Dedicated Storage for Certified Materials
  • Color-Coded Labeling System
  • First-In-First-Out (FIFO) Inventory Control
  • Moisture-Controlled Storage for Sensitive Alloys
PHASE 2

In-Process Quality Control (IPQC)

During production, multiple inspection checkpoints are implemented to maintain process stability and Tight Tolerance Machining Quality. From first article validation to statistical process monitoring, we ensure machining parameters and tooling conditions remain within controlled limits.

STAGE 01

Setup Approval

Control Method

First Piece Inspection

Frequency

Every setup

Equipment Used

CMM, Surface Plate

STAGE 02

During Production

Control Method

Statistical Process Control

Frequency

Every 25 pieces

Equipment Used

Machine Probes, Gauges

STAGE 03

Tool Change

Control Method

Tool Wear Monitoring

Frequency

Based on tool life

Equipment Used

Tool Presetter, Microscope

STAGE 04

Process Parameters

Control Method

Parameter Monitoring

Frequency

Continuous

Equipment Used

CNC Monitoring Software

PHASE 3

Final Quality Control (FQC)

Before shipment, each production batch undergoes final verification under our comprehensive Dimensional Inspection Services protocol. This includes visual checks, AQL-based dimensional sampling, functional validation where required, and complete inspection documentation.

Visual Inspection (100%)

Surface defects, burrs, scratches

Dimensional Check (AQL Sampling)

Per ISO 2859-1, Level II

Functional Testing

As per customer requirements

Documentation

Complete inspection report, material certs

Packaging Verification

Cleanliness, protection, labeling

About Yueyi Precision

Our Quality Certifications & Standards

REGISTRY_01
Active Specification

CMM Coordinate Measuring Machine

Our Coordinate Measuring Machine (CMM) provides high-accuracy 3D dimensional inspection for complex CNC components. It ensures tight tolerance compliance by verifying critical features directly against CAD data and engineering drawings.
REGISTRY_02
Active Specification

Digital Height Gauge

This precision digital height gauge is used for accurate vertical dimension measurement, step height verification, and layout inspection of machined components during in-process and final quality checks.
REGISTRY_03
Active Specification

2D Vision Measurement System

This vision-based measurement system enables fast and precise inspection of contours, hole diameters, and small features on CNC machined parts, supporting efficient batch inspection and dimensional consistency.
REGISTRY_04
Active Specification

2.5D Optical Measurement System

Used for rapid dimensional verification of precision machined parts, this 2.5D optical measurement system enables non-contact inspection of profiles, hole positions, and critical geometric features, improving efficiency in CNC part quality control.
REGISTRY_05
Active Specification

Surface Roughness Tester

Used to measure surface finish parameters such as Ra and Rz, this surface roughness tester ensures that machined components meet functional and aesthetic surface requirements specified by customer drawings.
REGISTRY_06
Active Specification

CMM Coordinate Measuring Machine

Our Coordinate Measuring Machine (CMM) provides high-accuracy 3D dimensional inspection for complex CNC components. It ensures tight tolerance compliance by verifying critical features directly against CAD data and engineering drawings.
REGISTRY_07
Active Specification

Digital Height Gauge

This precision digital height gauge is used for accurate vertical dimension measurement, step height verification, and layout inspection of machined components during in-process and final quality checks.
REGISTRY_08
Active Specification

2D Vision Measurement System

This vision-based measurement system enables fast and precise inspection of contours, hole diameters, and small features on CNC machined parts, supporting efficient batch inspection and dimensional consistency.
REGISTRY_09
Active Specification

2.5D Optical Measurement System

Used for rapid dimensional verification of precision machined parts, this 2.5D optical measurement system enables non-contact inspection of profiles, hole positions, and critical geometric features, improving efficiency in CNC part quality control.
REGISTRY_10
Active Specification

Surface Roughness Tester

Used to measure surface finish parameters such as Ra and Rz, this surface roughness tester ensures that machined components meet functional and aesthetic surface requirements specified by customer drawings.

Our Quality Certifications & Standards

At Yueyi precision, Quality Assurance (QA) represents the foundational systems and cultural commitment that ensure quality is built into every process, not just inspected at the end. It is our proactive promise to design, manage, and continually improve our operations to prevent defects before they occur, ensuring reliability for your most critical applications.

Where Precision Meets Trust

Our QA framework is anchored by internationally recognized certifications—ISO 9001, ISO 13485, and IATF 16949—and is powered by a closed-loop system of planning, execution, audit, and refinement. This means every project benefits from standardized procedures, risk-based thinking, supplier management, and continuous training, creating a traceable and accountable pathway from your design to the finished part in your hands.

Yueyi precision — Where Precision Meets Trust

At Yueyi Precision, our integrated systems are designed to deliver dependable CNC Machining Quality Control at every level of production. We don’t just meet specifications — we build long-term partnerships based on reliability, transparency, and consistent manufacturing performance.

schedule a factory tour

Ready to start Your next project?

Contact our technical experts today for a customized solution and a tailored quotation.

Upload your CAD files to get an instant quote

Uploading weapons or parts subject to export control regulations such as ITAR, EARbeyond EAR99, or EU Dual Use is a violation of our terms of use.

Our expert team will contact you within 24 hours

to provide a free technical evaluation and solution design, helping you upgrade your production process.

ADDRESS

NO.22,You Yi Road ,Wulian Community, LongCheng Street ,Long gang District ,Shen Zhen

Email

icey@yueyiprecision.com