How to Perform Quality Control on Parts After Shot Blasting in Automotive Manufacturing

Quality control of parts following shot blasting in the automotive industry primarily encompasses the following aspects:

Visual inspection: Checking for surface scratches, deformation, corrosion, and other issues. Inspectors rely on visual acuity to identify defects such as fractures or warping.

Dimensional inspection: Using tools such as calipers, micrometers, and 3D coordinate measuring machines (CMMs) to verify that part dimensions meet design specifications.

Material testing: Verifying material composition and quality through chemical analysis, metallographic analysis, and other methods.

Mechanical property testing: Using tensile testing machines, impact testers, and other equipment to assess hardness, strength, and other mechanical properties.

Non-destructive testing (NDT): Employing ultrasonic, magnetic particle, penetrant, and other methods to detect internal defects.

Environmental adaptability testing: Testing components under high-temperature, low-temperature, damp-heat, and other climatic conditions to evaluate their adaptability and durability in various environments.

Functional testing: Conducting functional tests on key components—for example, testing current and voltage for electronic components and operational performance for mechanical components.

Label verification: Ensuring that part labels are complete and accurate, including details such as the part name, batch number, and date of manufacture.

Purpose and effect of shot blasting: Shot blasting is primarily used to remove surface contaminants (such as oxide scale and oil stains) and to increase surface roughness, thereby improving coating adhesion. The surfaces of the parts to be processed must be clean and free of residue, and the surface roughness must meet the requirements necessary to ensure the desired effect of spraying or other subsequent treatments.