Inspection and Shipping

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Inspection and Shipping

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Inspection and Shipping

Inspection and shipment is the final process to ensure that the products meet the quality requirements and meet customers’ expectations. Through a series of rigorous inspection processes, we are able to ensure that each sheet metal part shipped from our factory meets the standards in terms of dimensional accuracy, surface quality, coating thickness and durability, and provide customers with high quality and reliable products.

Inspection Process

After processing and surface treatment, sheet metal parts are subjected to comprehensive quality inspections. These tests cover all aspects of the product, including dimensional measurements, surface inspections, coating adhesion tests and other mechanical property tests. We use modern testing equipment and standardized processes to ensure that each product meets the highest quality standards.

Dimensional Accuracy Inspection

Dimensional accuracy is a key quality indicator for sheet metal parts. We use high-precision equipment, such as Coordinate Measuring Machines (CMM), to precisely measure the dimensions, angles, and hole positions of sheet metal parts, ensuring that the dimensional tolerances meet customer specifications.
  • Measurement Tools: Coordinate Measuring Machine (CMM), vernier calipers, micrometers, and other precision instruments.
  • Inspection Items: Key parameters such as the external dimensions, hole distances, and bending angles of sheet metal parts.
  • Accuracy Standards: Inspections are conducted in accordance with the tolerance standards based on customer-supplied drawings or technical specifications.

Surface quality inspection

Surface quality directly impacts the appearance and durability of a product, especially for powder-coated sheet metal parts. We conduct rigorous surface inspections to ensure they are free of blemishes, scratches, and dents.
  • Inspection Methods: Visual inspection, tactile inspection, and specialized optical equipment to check surface smoothness.
  • Inspection Items: Uniformity and gloss of the coating, checking for defects such as particles, bubbles, drips, or peeling.
  • Coating Requirements: Color consistency, smooth and flawless surface, meeting the customer’s aesthetic and decorative standards.

Coating thickness and adhesion test

For powder-coated sheet metal parts, the thickness and adhesion of the coating directly affect the product’s durability and corrosion resistance. We use specialized instruments to measure coating thickness and adhesion to ensure they meet design specifications.
  • Coating Thickness Measurement: Using a coating thickness gauge, we measure the uniformity of the coating to ensure the thickness falls within the 60 to 120 micrometer range.
  • Adhesion Testing: The coating’s bond to the substrate is tested using the cross-hatch method or pull-off test to ensure the coating will not peel or detach under normal usage conditions.

Mechanical and Functional Testing

According to different application scenarios and customer requirements of sheet metal parts, we also test the mechanical properties of sheet metal parts. These include impact resistance, bending resistance, tensile resistance and other functional tests to ensure that the products have sufficient strength and durability in actual use.
  • Impact resistance test: to ensure that the product can withstand impact during transportation and use.
  • Fatigue Test: For sheet metal parts that need to withstand repetitive loads, test their anti-fatigue performance to ensure that the products do not break or deform under prolonged use.

Packaging and protective measures

After all inspections are completed and qualified, the sheet metal parts enter the packaging process. In order to ensure that the products are not damaged during transportation and storage, we will take professional packaging and protective measures:
  • Protective materials: Packing materials such as foam, pearl cotton, plastic film, etc. are used to avoid the parts from being bumped or scratched during transportation.
  • Anti-corrosion treatment: For products that may be stored for a long time or exposed to humid environments, we will add additional protective treatments such as rust inhibitor coating or vacuum packaging to extend the shelf life of the products.