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Product pageServo forming

Automotive Brake Pad Shim Bending & Forming Equipment / Assembly Line

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.

± 0.5°ANGLE ACCURACY

Shim servo bending · process blueprint

What is brake pad shim bending & forming equipment?

Brake pad shim bending and forming equipment is an automated machine that feeds multi-layer acoustic shim material, servo-bends and cuts it into brake pad shims. In-line angle inspection and springback pre-compensation keep bend-angle consistency, with SMED multi-variant changeover.

01PROCESS WINDOW

Servo bending process for shims

Bend angle and travel are stored per product model and recalled from the HMI; pre-compensation follows the batch springback angle and is corrected closed-loop by in-line measurement.
  1. 01

    Multi-layer auto feeding

    • Multi-layer composite shims are automatically fed and located, accommodating different thicknesses and layer structures
  2. 02

    Servo bending

    • The servo press controls bend angle and travel by recipe for consistent forming
  3. 03

    In-line angle inspection

    • Vision/laser measures the formed angle in line, judging each piece against tolerance
  4. 04

    Springback compensation

    • Pre-compensates (over-bends) for the ~2°–5° springback and corrects closed-loop to ±0.5° using measured feedback
  5. 05

    Sorting & logging

    • Out-of-tolerance parts are diverted; full-process parameters are logged for per-piece traceability
02CAPABILITIES

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

03WORKPIECES

Applicable workpieces

Built on the delivered automatic shim bending/forming equipment; similar resilient metal parts requiring precision angle forming can be extended by process. Each extension retains the servo bending and cutting plus in-line vision or laser angle measurement and the closed correction loop, pre-compensating for the roughly 2°–5° springback angle of each material batch to stably hold the ±0.5° automotive angle tolerance. Routine multi-variant changeover stays within 15 minutes using SMED quick-change fixtures and one-click recipe recall from the HMI; out-of-tolerance parts divert automatically to a separate reject lane and full-process parameters remain fully logged for automotive per-piece traceability and IATF 16949 records, suiting multi-variant, medium-and-small-batch flexible production.

Brake pad shim

Multi-layer servo bending + springback compensation, delivered to an automotive brake system supplier

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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

SPEC

Selection parameters

Reference parameters; concrete angle tolerance, takt and tooling are confirmed per product drawings, material and capacity.

Selection parameters
MetricValue
Bend angle accuracy± 0.5°
Springback range~2°–5° springback
Multi-variant changeover≤ 15 min
Key processServo bend + in-line angle check
Inspection itemsBend angle / appearance / dimension
Form factorStandalone or auto-load turnkey line
Traceability / systemFull-process logging · per-piece
Delivery / response~60-day standard · 24h response
05REFERENCE CASE

Reference case

Automatic brake pad shim bending/forming equipment (±0.5°, SMED ≤15 min), delivered on site.
View all projects
Brake Pad Shim Automatic Bending & Forming Equipment
2025Automotive Brake System Supplier

Brake Pad Shim Automatic Bending & Forming Equipment

Challenge
Automatic bending and forming equipment for multi-layer composite brake pad shims — integrating servo bending, inline angle inspection, springback compensation, and defect sorting to meet automotive-grade consistency.
Solution
  • Servo bending & forming
  • Inline angle inspection
  • Automatic springback compensation
Results
  • Brake pad shimProduct type
  • ±0.5°Angle precision
  • Servo bend + closed-loop angleKey process
    • View case detail
    FAQ · 06

    Shim bending FAQ

    How does a shim bending machine handle spring-steel springback?
    Spring steel typically springs back by about 2°–5° after bending, varying with material batch. The machine uses servo bending with a closed angle loop, pre-compensating (over-bending) for the springback, with in-line vision/laser angle measurement and automatic reject sorting; measurement can be fed back into compensation to reach ±0.5° bend accuracy.
    What bend accuracy is achievable and how is it guaranteed?
    Stably ±0.5°. A servo press controls bend angle and travel, vision/laser measures each formed angle in line, and springback pre-compensation plus closed-loop correction keep the angle on target; out-of-tolerance parts are sorted out and all parameters remain traceable.
    Does it support multi-variant changeover? How long does it take?
    Yes. SMED quick-change fixtures allow routine multi-variant changeover within 15 minutes; bend angle and travel are stored as per-model recipes and recalled from the HMI with one click, suiting multi-variant, medium-and-small-batch flexible production.
    Is it a standalone machine or a full line? What is the scope and lead time?
    Both standalone machines and integrated lines with automatic load/unload are available, covering multi-layer material feeding, servo bending, in-line inspection, reject sorting and data logging. Equipment is built to automotive-grade quality; standard solutions deliver in about 60 days with a 24-business-hour response.
    How are defective parts prevented from escaping? What else can it form?
    Every piece passes in-line angle inspection and appearance/dimension checks; out-of-tolerance parts divert to a reject lane and full-process logging supports automotive per-piece traceability and customers' IATF 16949 audits. Beyond brake shims, the servo-bending plus springback-compensation platform suits multi-layer damping shims/washers, spring-steel clips and shaped metal strip parts with angle tolerances.

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