Brake Pad Shim Automatic Bending & Forming Equipment

The brake pad shim bending and forming equipment is an automated forming system for automotive brake components, delivered in 2024 to an automotive brake system supplier (shown as an industry-generic description under customer confidentiality constraints). It integrates multi-layer material feeding, servo bending and forming, inline inspection, defect sorting and data logging into a single line.

Spring steel springs back by about 2°–5° after bending, varying with material batch. The equipment uses servo bending with closed-loop angle control, pre-compensating (over-bending) for the springback angle, then measures the formed angle inline with vision/laser and feeds the result back into compensation when needed. Bending angle accuracy reaches ±0.5°.

Every piece passes inline bend-angle inspection plus visual and dimensional checks; out-of-tolerance parts are automatically sorted into a reject lane to prevent escape. Full-process parameter logging supports automotive-grade per-piece traceability and customers' IATF 16949 audit requirements.

The equipment is compatible with multi-layer composite shim materials, adapting to different thickness and layer combinations through adjustable bending parameters and fixtures, cutting changeover waiting time while keeping forming consistency. SMED quick-change fixtures allow routine multi-variant changeover within 15 minutes; bending angle, travel and other process parameters are stored as per-model recipes and recalled from the HMI with one click.

Delivery can be a standalone machine or an integrated line with automatic load/unload, covering multi-layer material feeding, servo bending and forming, inline inspection, defect sorting and data logging. Equipment is designed and built to automotive-grade quality requirements; standard solutions deliver in about 60 days.

The front of the line handles raw strip stock before any forming begins: a powered unwinder feeds the multi-layer material at controlled tension, and servo straightening removes coil set so each segment reaches the bend station flat and repeatable. Because layer count and total thickness change between shim programs, the straightening roll gaps and feed pitch are stored per model and recalled together with the bend recipe, eliminating manual re-measurement at changeover.

Forming and cut-off are synchronized on the same servo cycle: once a part is bent, measured and accepted, it is cut to the finished length and transferred out, while an out-of-tolerance part is diverted before the cut so it can never rejoin the accepted stream. The sorting interlock works together with the measurement station rather than as a separate manual check, which is how a single line holds automotive-grade angle consistency shift after shift without adding inspection labor.

Beyond brake shims, the validated combination of servo forming, inline angle measurement and springback compensation applies to other resilient strip components, with bending fixtures and compensation curves adapted to each part's geometry and material batch behavior.