Powering Intelligent Motion: Precision Control for Every Move
High Dynamic Response · Zero Backlash Design · Designed for Tens of Millions of Cycles
Industry Overview
In robotics, springs are not just fasteners; they are the soul of motion control. Industrial arms face the paradox of 'High Load vs. Lightweight,' collaborative robots (Robots) demand 'Zero Backlash' for flexible feedback, and humanoid dexterous hands require 'High Explosive Force' within millimeter-scale spaces. Standard springs often fail due to dynamic fatigue, force decay, or fracture, leading to costly downtime.
Application Coverage
- Industrial Robots：Gravity Compensation / Balancing Cylinder Springs End-Effector / Gripper Return Springs ATC (Automatic Tool Changer) Locking Springs
- Collaborative Robots (Cobots)：Joint Torque Sensor Springs Electromagnetic Brake / Safety Brake Springs
- Mobile Robots (AMR / AGV)：Independent Suspension Shock-Absorber Springs Charging Contact Springs
- Humanoid / Bionic Robots：Finger Micro-Actuation Springs Foot Impact-Resistance Springs
Robotic Solutions & Customization Capabilities
Hershey Spring is engineered for precision motion control. We offer comprehensive solutions ranging from 0.03mm micro-joint springs to heavy-duty balancing springs. Utilizing high-tensile music wire and exotic alloys, combined with proprietary stress-relief processes, we ensure our springs maintain constant linearity during high-frequency oscillation. We eliminate resonance and hysteresis, enabling robots to achieve smoother, more precise trajectories.
Industry-Grade Materials
- High-Fatigue Music Wire
Selected from SWP-B (JIS G3522) or ASTM A228 standard materials. Preferred for industrial robot grippers and high-frequency moving components, offering exceptional tensile strength and dynamic resilience.
Music Wire (ASTM A228): The standard for dynamic load applications, providing superior tensile strength for grippers and high-frequency actuators.
- High-Strength Chrome Silicon
Used in heavy-duty gravity balancing mechanisms. Compared to standard carbon steel, it operates under higher stress levels with minimal thermal relaxation.
Chrome Silicon (CrSi): Essential for heavy-duty gravity balancing, capable of withstanding higher stress and heat without relaxation.
- Non-Magnetic Titanium
For environments near magnetic-sensitive sensors or specialized demining/medical robots, Ti-6Al-4V titanium alloy springs are used—lightweight and fully non-magnetic.
Titanium (Ti-6Al-4V): Lightweight and non-magnetic options suitable for sensitive sensor areas or specialized medical robots.
Mechanical/Functional Customization Options
- Miniaturization
For humanoid dexterous hands, ultra-micro tension and torsion springs with wire diameters down to 0.03 mm are provided, simulating fine muscle movements.
Micro-Springs (0.03 mm): Mimic delicate muscle-like extension and contraction in dexterous robotic hands.
- Rectangular / Flat Wire Springs
In collaborative robot joints with limited space, flat wire springs deliver 30–50% higher load capacity than round wire springs.
Flat Wire Springs: Offer significantly higher load in restricted joint spaces compared to traditional round wire.
- Constant Force / Low-Rate Springs
Customized for soft grippers or tactile sensors, these low-stiffness springs enable “gentle contact,” protecting fragile workpieces.
Low-Rate Springs: Ensure soft, safe interaction with delicate objects in robotic handling.
Industry-Focused Processes
- 100% Automated Inspection
Incorporates CCD vision systems to monitor each spring’s free length and wire diameter in real time on the production line, ensuring perfect fit with automated assembly lines and preventing jamming.
Real-time CCD Visual Inspection: Ensures every spring integrates seamlessly into automated assembly, eliminating the risk of jamming.
- Precision Stress Relief
Strict furnace temperature control relieves coiling stress, guaranteeing dimensional stability during long-term use.
Strict Temperature Control: Eliminates coiling-induced stress, ensuring springs maintain consistent dimensions over time.
Durability & Reliability Enhancements
- Presetting / Scragging
Springs are compressed to their solid height to eliminate initial plastic deformation, ensuring Z-axis or balancing mechanisms maintain consistent force over millions of cycles.
Compressing to Solid Height: Removes initial set, guaranteeing no force loss in robotic Z-axis or balancing systems over millions of operations.
- Shot Peening
Imparts residual compressive stress to the spring surface, significantly enhancing resistance to micro-cracks and extending fatigue life to 10 million+ cycles.
Introducing Residual Compressive Stress: Boosts surface durability and prevents micro-cracking, achieving fatigue life of 10M+ cycles.
Quality Assurance & Certifications
FAQ
Yes. For high-frequency robotics applications, we use imported high-fatigue Music Wire or Oil Tempered Wire (e.g., SWOSC-V). Through specialized shot peening and pre-setting processes, we can achieve a fatigue life ranging from 1 million to over 10 million cycles.
Absolutely. We manufacture micro springs with wire diameters as small as 0.08mm. We also specialize in custom shaped springs (such as square or flat wire springs) to provide higher loads in limited spaces, helping you achieve a lightweight structural design.
We offer a robust supply chain of special materials, including Inconel, Elgiloy, and Titanium. Combined with surface treatments like Gold Plating or Teflon Coating, we can meet specific requirements for high heat resistance, corrosion resistance, or non-magnetic insulation.
Yes. Our engineering team supports Early Supplier Involvement (ESI). You simply need to provide the working space, required force, and travel distance. We will calculate the spring rate, perform stress analysis, and recommend the optimal design for you.
Yes, we do. We have a dedicated sample team that provides rapid prototyping services (typically 3-5 days) for small batches. This helps you validate your design quickly and cost-effectively.
For high-precision robotic components, we can control load tolerance to within ±5% or even ±3% through 100% inspection. This ensures batch consistency and minimizes your calibration costs.