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Quality

Quality

Our quality inspection process

Strict quality inspection procedures ensure the excellent quality of every metal part.

Workshop window with a posted sign at the Cangzhou factory

Since our production base was established in 1999, Xinjiuxinji has always integrated quality control into every aspect of the production process.

We are equipped with two sets of high-precision three-coordinate measuring machines (CMM), image measuring instruments, spectrometers, roughness gauges, salt spray test chambers, and a complete set of general measuring tools (calipers, micrometers, height gauges), and have formed a professional quality inspection team to conduct full-process inspections from the entry of raw materials into the factory to the shipment of finished products.

Here is our strict quality inspection process:

Certification and inspection records. The ISO 9001:2015 certificate is held by Cangzhou Xinjiuxinji Import And Export Co., Ltd., certificate no. ZTZL28025Q1049R0S, issued by ZTZL (CNAS C234-M), valid until 6 July 2028, covering the processing of metal stamping parts. Incoming material is checked when it reaches the base, and finished parts are checked before packing; both checks are logged. Each production batch keeps its own record, so a shipped part can be traced back to the material batch it came from.

Coordinate measuring machine in the quality control lab

Raw materials and first article verification

Starting from the source, set the standard for mass production

  • Raw material inspection:Upon entering the factory, use a spectrometer to test material composition and verify compliance with order requirements; use measuring tools such as calipers and micrometers to inspect basic dimensions, such as thickness and width, to prevent unqualified materials from entering production.
  • First article inspection:After the mold debugging or program setting is completed, conduct the first article inspection. Use an image-measuring instrument to detect complex contours, and a three-coordinate measuring machine (CMM) to measure key dimensions and geometric tolerances. Only after the first article is qualified can mass production begin.

Production Process and Finished Product Inspection

Process inspection: During mass production, quality inspectors randomly inspect each process at fixed time intervals. For bending and stamping fabrication, a roughness tester is used to measure surface smoothness to ensure there are no scratches or burrs; for mechanical fabrication, image-measurement instruments and measuring tools are used to verify key dimensions, such as hole diameters and slot widths.

Final inspection of finished products: Complex components are inspected using a coordinate measuring machine (CMM), and reports are issued; calipers and micrometers verify regular dimensions; surface smoothness is measured with a roughness tester; for components with anti-corrosion requirements, the reliability of surface treatment is verified through a salt spray test chamber.

Inspector measuring a part on an optical measuring machine

Final Inspection Before Shipment

Ensure Zero Defects in Delivery

Before packaging and shipping, the quality inspection team will conduct a final inspection to confirm the products' appearance, cleanliness, and packaging integrity, and verify the accompanying documents (such as material certificates and test reports). Only those items that pass all the inspections will be released for shipment, ensuring that each batch of products you receive can withstand the test.

Worker inspecting polished metal parts at a workbench

Get a free quote immediately and embark on your journey to build more efficient and powerful facilities.

Xinjiuxinji is always ready to discuss your requirements for custom metal parts. Please send the drawings, and we will provide you with a professional, free quote.

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What Our Clients Say About Us
"The tolerance requirements were extremely strict. We originally worried that we couldn't find a suitable supplier. But to our surprise, the sample was approved on the first try, and the delivery speed exceeded our expectations. For such high-precision custom parts, we will definitely choose this supplier in the future."--Mary from the United States
"I looked at several quotations, but only this company offered both reasonable prices and clear explanations about the materials and craftsmanship. After receiving the goods, the quality inspection was completely satisfactory. They are a large factory with high-quality products, and they also accept small orders. They are a very reliable partner!" --- From Jack in the UK

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