Pain Points:
Gear shafts are subjected to combined torque transmission, bending stress, and impact loads during operation.
Keyways, steps, splines, and similar features on the shaft create severe stress concentrations and serve as initiation sites for fatigue cracks.
Surface wear and fretting corrosion lead to reduced transmission accuracy and increased vibration.
Shaft fracture can trigger cascading damage throughout the entire transmission system.
Value of Shot Peening:
Strengthens stress concentration areas such as keyways and steps, improving torsional fatigue and bending strength.
Enhances journal surface wear resistance, extending the service life of bearing mating surfaces.
Resists fretting fatigue, reducing damage risk at splines and interference-fit joints.
Ensures transmission system reliability and reduces equipment downtime.
Pain Points:
Rotor shafts endure immense centrifugal forces and alternating bending loads at high rotational speeds.
Motor/generator rotor shafts demand exceptionally high dynamic balance and dimensional stability.
Surface micro-defects can easily propagate into fatigue cracks under high-frequency vibration.
Failure can lead to complete equipment destruction, safety incidents, and prolonged production stoppages.
Value of Shot Peening:
Significantly improves bending fatigue strength to adapt to demanding conditions of high speed and alternating loads.
Eliminates the effects of machining marks and surface micro-defects, stabilizing fatigue performance.
Improves surface integrity, enhancing dimensional stability and dynamic balance retention.
Extends overhaul intervals, ensuring long-term reliable operation of high-speed rotating equipment.
Pain Points:
Tool housings are typically castings, with residual molding sand, scale, and burrs affecting assembly and appearance.
Surface micro-cracks and porosity in castings can lead to leakage under pressure.
Housings are subjected to internal media pressure and external impact loads, posing a risk of fatigue cracking.
Value of Shot Blasting:
Efficiently removes molding sand, scale, and burrs, yielding a clean casting surface.
Eliminates tensile stress on casting surfaces and introduces a compressive stress layer to resist fatigue cracking.
Exposes and eliminates surface micro-defects, improving sealing integrity and pressure resistance.
Provides an ideal rough substrate for anti-corrosion/decorative coatings, enhancing adhesion and surface aesthetics.
Pain Points:
Fasteners (high-strength bolts, screws, etc.) are used in vast quantities and serve as the critical “final link” in structural connections.
Thread roots, head fillets, and other features are subject to extreme stress concentrations.
Fasteners bear preload, alternating loads, and vibration; loosening or fracture can trigger structural failure.
Fasteners in high-end sectors such as aerospace and wind power demand exceptional reliability.
Value of Shot Peening:
Strengthens critical stress areas such as thread roots, significantly improving tensile fatigue strength.
Enhances resistance to fretting wear and loosening, ensuring connection reliability.
Improves product consistency and batch-to-batch stability, meeting mass production quality requirements.
Meets fatigue performance standards for high-end applications (aerospace, wind power).
Pain Points:
Springs endure repeated torsional, bending, or tensile stresses during service, with fatigue fracture as the primary failure mode.
Surface scratches, decarburized layers, and micro-defects rapidly initiate fatigue cracks under stress.
Spring failure can cause functional loss of the mechanism or trigger cascading damage.
Value of Shot Peening:
Significantly improves spring fatigue life — the most cost-effective and impactful strengthening method in spring manufacturing.
Eliminates the effects of surface micro-defects and decarburization, improving product consistency.
Spring shot peening is an industry-standard process widely applied across various mechanical spring types.
