# STIER Project Case | Efficient Grinding of Weld Scars on Battery Boxes

- Source: 斯帝尔科技 · 微信公众号
- Published: 2026-10-30T02:07:16.000Z
- RoboHot: https://robohot.news/en/items/tt23jb74zq65n85umn2x25g6j
- Original: https://mp.weixin.qq.com/s?__biz=MzA4MzAwMzY0OQ==&mid=2247485728&idx=1&sn=0c6f3f3b6549453b00def924640606a7&chksm=9eaa2f258bbd6efc61f123843f5134b62b3b7dd6d7b955ccc08724202412ec83eab3ee4816ac&scene=126&sessionid=1793359821#rd

## Summary

STIER uses the PolishX axial flexible force control device together with a flexible grinding robot to grind weld scars on battery boxes. The minimum actual output force can be controlled down to 1 N, with force control accuracy of ±0.8 N and response under 10 ms. A positioner enables autonomous grinding across multiple areas and autonomous tool changing. In testing, weld scars were removed cleanly and R corners and edges transitioned smoothly, with a cycle time of no more than 100 s per piece and a first-pass yield of no less than 90%. The solution targets welded box-type workpieces in the automotive and new energy industries and supports process validation with customer-supplied parts.