Brake Pad Shim Bending & Forming Equipment
Servo bending + in-line angle closed-loop + spring-steel springback compensation, bend accuracy ± 0.5°, SMED changeover ≤ 15 min, standalone or auto-load line
Brake pad shims are multi-layer composites containing spring steel; after bending they typically spring back by about 2°–5°, varying with material batch, so ordinary bending cannot reliably hold automotive angle tolerances. ESML shim bending equipment uses servo bending with in-line angle inspection, pre-compensating (over-bending) for the springback angle with closed-loop correction to reach ± 0.5° bend accuracy. It supports multi-layer materials and SMED multi-variant changeover (≤ 15 minutes), sorts out-of-tolerance parts and logs full-process parameters. It can be delivered as a standalone machine or an integrated line with automatic load/unload, and has been used at an automotive brake system supplier.
Shim servo bending · process blueprint
Servo bending process for shims
Multi-layer auto feeding
- Multi-layer composite shims are automatically fed and located, accommodating different thicknesses and layer structures
Servo bending
- The servo press controls bend angle and travel by recipe for consistent forming
In-line angle inspection
- Vision/laser measures the formed angle in line, judging each piece against tolerance
Springback compensation
- Pre-compensates (over-bends) for the ~2°–5° springback and corrects closed-loop to ±0.5° using measured feedback
Sorting & logging
- Out-of-tolerance parts are diverted; full-process parameters are logged for per-piece traceability
Core bending capabilities
Angle closed-loop ±0.5°
Servo bending + in-line measurement + springback compensation reach ±0.5° bend accuracy
Multi-layer compatibility
Handles multi-layer composite shims and spring steel, compensating per material batch
SMED changeover ≤15 min
Quick-change fixtures and one-click recipes suit multi-variant, small-and-medium batches
Automotive traceability
Full-process parameter logging and automatic reject sorting support IATF 16949 records
Applicable workpieces
Brake pad shim
Multi-layer servo bending + springback compensation, delivered to an automotive brake system supplier
View case →Multi-layer damping shim / washer
Bend forming of similar layered materials; springback-compensation know-how transfers
Spring-steel stamping / clip
Precision bending of resilient metal clips, with compensation curves tuned to springback
Shaped metal strip part
Stamped parts with angle-tolerance requirements, extendable on the servo platform
Selection parameters
Reference parameters; concrete angle tolerance, takt and tooling are confirmed per product drawings, material and capacity.
| Metric | Value | Notes |
|---|---|---|
| Bend angle accuracy | ± 0.5° | Servo bending + angle closed-loop |
| Springback range | ~2°–5° springback | Pre-compensated per material batch (over-bend) |
| Multi-variant changeover | ≤ 15 min | SMED fixtures + recipe recall |
| Key process | Servo bend + in-line angle check | Vision / laser measurement |
| Inspection items | Bend angle / appearance / dimension | Out-of-tolerance parts auto-sorted |
| Form factor | Standalone or auto-load turnkey line | Feed–bend–inspect–sort |
| Traceability / system | Full-process logging · per-piece | Supports customers' IATF 16949 audits |
| Delivery / response | ~60-day standard · 24h response | Assessed by process complexity & scale |
Reference case
Shim bending FAQ
How does a shim bending machine handle spring-steel springback?
What bend accuracy is achievable and how is it guaranteed?
Does it support multi-variant changeover? How long does it take?
Is it a standalone machine or a full line? What is the scope and lead time?
How are defective parts prevented from escaping? What else can it form?
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