Stress Leaf Spring Peening Machine (SPA)
The Stress Leaf Spring Peening Machine delivers high-precision mechanical shot peening for automotive and industrial leaf springs, enhancing fatigue strength and extending service life under demanding load conditions.
Using continuous roller conveyor rotary through-feed technology, the SPA system ensures that every leaf spring is processed under controlled and repeatable conditions. Each part passes through the “hot spot” of the blast stream — the optimal zone for inducing compressive stress — resulting in consistently uniform treatment and improved component durability.By pre-tensioning the leaf springs in a jig, even better fatigue strength values can be achieved than when shot peening in anunstressed state.
The system combines fully automatic operation, continuous material flow, and precise parameter control to guarantee process-safe, repeatable performance. Compact,durable, and energy-efficient, the SPA machine can be easily integrated into high-volume production lines or operated as a stand-alone system.
Applications
- Shot peening of leaf springs for automotive and heavy-duty vehicles
- Stress peening of suspension components to improve fatigue life
- Surface strengthening of spring assemblies prior to assembly or coating
Key benefits
Enhanced fatigue strength
Enhanced fatigue strength through uniform stress peening
Continuous, fully automatic
Continuous, fully automatic through-feed operation for high throughput
Process-safe
Process-safe, defined peening with adjustable dwell times and feed speeds
Consistent and reproducible results
Consistent and reproducible results via controlled blast parameters
Low operating costs
Low operating costs with high energy efficiency and minimal supervision
Compact
Compact, robust construction for easy integration into production lines
Industries
- Automotive and commercial vehicle manufacturing
- Heavy machinery and transportation equipment
- Spring and suspension component production
Configurations / Options
Machine design
Continuous flow roller conveyor Rotary through-feed system with 2 or 4 blast wheels
Blast wheel arrangement
Roof-mounted TITAN wheels positioned for optimal peening coverage across the leaf spring surface
Power per blast wheel
30 - 55 45 kW (variable via frequency control for optimized performance)
Feed system
Driven roller conveyors ensure stable, consistent movement through the blast zone
Separation system
Maintains consistent shot quality for repeatable results