The parts
A new-energy vehicle maker takes small turned metal parts directly from the factory: knurled press-in threaded inserts and stepped sleeves.
The requirement
A press-in insert has two jobs. Its knurl must hold in the host part, and its thread must take the screw. A stepped sleeve needs each diameter and length in position to the others. On parts this small, both mean tight tolerances. The factory holds ±0.01 mm.
Illustration model, not the customer’s part
Illustration model of the part
- Process
- CNC turning
- Material
- Finish
Arrow keys turn the part. Home resets the view. Number keys select a feature.
The process
The parts are turned in house, with knurling and threading. A first-article report comes before production. Each lot is released through outgoing inspection, sampled to GB/T 2828.1-2012 and measured with a micrometer and a profile projector. Where a part needs plating or another finish, partner suppliers do it.
What the customer receives
The parts and the outgoing inspection report for the lot.
Result
Tolerance can be held to ±0.01 mm on these parts.