[Automotive Industry Case Study] Achieving High Precision through the Fusion of 3D Printing and Machining

3D printer-made front bumper inspection jig

In the automotive production line, which requires strict quality control, various inspection jigs are used to verify the dimensional accuracy of parts. Many of these jigs are made of heavy metal, which adds to the burden on workers and leads to decreased productivity. Our company can produce high-precision inspection jigs by combining 3D printing and machining. ■ Processing Method FDM × SLS × Machining ■ Material ASA + Nylon 12 ■ Size 800 × 400 × 80 mm 【Concerns】 - The jigs are heavy and pose a significant physical burden during repetitive tasks. - They are large, and precision cannot be achieved with 3D printing alone. 【Requests】 - We want to reduce the burden on workers. - We also need precision for inspection purposes. 【Proposal】 By using a large-scale modeling machine to create a base component for strength in one piece and producing the frame in smaller sections, we can repair it by replacing only the damaged parts in case of breakage. Most importantly, to achieve dimensional accuracy that cannot be realized with 3D printing alone, we finished the jigs with machining to achieve a dimensional accuracy of ±0.2 mm. We successfully transformed the jigs into a resin form that can be used on-site, reducing weight (from 6 kg to 3 kg). This has alleviated the burden on workers and improved work efficiency.

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