Quality Control Across Materials, Production and Finished Products
Guangzhou Pinxiu Auto Parts Co., Ltd. applies inspection procedures from incoming materials through production and finished-product preparation.
Quality control covers material verification, process inspection, dimensional measurement, heat-treatment inspection, functional testing, and final inspection for automotive drivetrain and suspension components.
Quality Management System
ISO 9001:2015 Certified
Pinxiu operates an ISO 9001:2015 quality management system covering the production and quality-control activities of its automotive parts manufacturing operations.
Incoming Material Inspection
Materials and purchased components are checked before entering production.
|
Inspection Area |
Inspection Items |
|
Material |
Material grade and specified material requirements |
|
Dimensions |
Material dimensions and required tolerances |
|
Hardness |
Hardness of applicable incoming materials |
|
Surface Condition |
Surface defects, damage, and visible irregularities |
|
Components |
Specifications and quantities of purchased components |
Materials that meet the applicable requirements are released for production.
In-Process Inspection
Inspection is performed during key manufacturing operations to control critical product dimensions and process requirements.
|
Production Stage |
Key Inspection Areas |
|
Cold Forging |
Forming dimensions and component geometry |
|
CNC Machining |
Critical dimensions, spline dimensions, threads, and interfaces |
|
Heat Treatment |
Hardness and hardening depth |
|
Finishing |
Surface condition and specified surface requirements |
|
Assembly |
Component configuration, fitment, and assembly dimensions |
Inspection requirements are defined according to the product and its technical specifications.
Dimensional & Precision Inspection
Dimensional accuracy is checked using dedicated measuring equipment and gauges.
Inspection covers:
Overall dimensions Critical dimensions Mounting dimensions Spline dimensions Spline count Thread dimensions Component interfaces Product tolerances Geometric dimensions where applicable
3D Coordinate Measurement
3D coordinate measurement is used for dimensional verification of applicable components and products.
Precision Gauging
Digital micrometers and Go/No-Go gauges are used for dimensional, spline, and thread inspection where applicable.
Material & Heat Treatment Inspection
Material and heat-treatment requirements are verified through physical and metallurgical inspection.
|
Inspection Item |
Purpose |
|
Hardness |
Verify specified material hardness |
|
Hardening Depth |
Verify the depth of the hardened layer on applicable components |
|
Metallographic Analysis |
Examine material structure and heat-treatment condition |
|
Material Structure |
Verify metallurgical characteristics of applicable components |
|
Surface Condition |
Check the finished surface against specified requirements |
Functional & Performance Testing
Testing is performed according to the product category and applicable technical requirements.
|
Product Category |
Key Testing Areas |
|
CV Joints |
Dynamic balancing, crack inspection, hardness, spline dimensions, and related component requirements |
|
Drive Shafts |
Dynamic balancing, spline fitment, dimensions, and assembly configuration |
|
Shock Absorbers |
Damping performance, leakage, mounting dimensions, and applicable functional requirements |
|
Coil Springs |
Spring dimensions, free height, spring rate, and applicable material requirements |
|
Wheel Hubs |
Bearing configuration, mounting dimensions, and applicable dimensional requirements |
|
Steering Racks |
Mounting dimensions, component configuration, and applicable functional requirements |
Testing items vary according to product structure and confirmed technical specifications.
Product-Specific Quality Standards
|
Product Category |
Key Quality Parameters |
|
CV Joints |
Hardness, hardening depth, spline dimensions, surface finish, crack inspection, dynamic balancing |
|
Drive Shafts |
Shaft dimensions, spline fitment, flange dimensions, dynamic balancing, assembly configuration |
|
Shock Absorbers |
Damping performance, leakage, rod and tube dimensions, mounting configuration |
|
Coil Springs |
Wire diameter, free length, spring diameter, spring rate, end configuration |
|
Wheel Hubs |
Hub dimensions, bearing configuration, bolt pattern, stud configuration, flange dimensions |
|
Steering Racks |
Rack dimensions, mounting points, input shaft configuration, tie-rod configuration |
Final Inspection Before Shipment
Finished products are inspected before order completion and shipment.
Final inspection covers:
Product dimensions Product configuration Appearance Product marking Part number Quantity Packaging condition Applicable functional or performance test results
For products with defined customer specifications, final inspection follows the confirmed product requirements.
Inspection Equipment
Pinxiu uses dedicated inspection equipment for dimensional, material, metallurgical, and product-specific testing.
|
Equipment |
Inspection Application |
|
3D Coordinate Measuring Equipment |
Dimensional and geometric measurement |
|
Hardness Tester |
Hardness verification |
|
Metallographic Equipment |
Material structure and heat-treatment analysis |
|
Digital Micrometers |
Precision dimensional measurement |
|
Go/No-Go Gauges |
Spline and thread dimensional verification |
|
MPI Equipment |
Surface crack detection for applicable components |
|
Dynamic Balancing Equipment |
Rotational balance inspection |
Quality Records & Traceability
Inspection results are recorded at applicable stages of production.
Records may include:
Incoming material inspection Process inspection Dimensional inspection Hardness testing Heat-treatment inspection Functional testing Final inspection Product test results
Quality records provide documented evidence of inspection results for applicable production batches and products.