EN
· Tolerance chain analysis: Conduct full tolerance stack-up calculation at the design stage to ensure the assembly meets force, stroke and smooth motion requirements under all extreme tolerance combinations.
· Guiding and coaxiality design: Set reasonable guiding clearance and support length to limit spring lateral deflection during operation, avoid eccentric wear and reduce force hysteresis.
· Material matching: Select compatible materials for all components based on operating temperature, corrosion and media conditions; avoid galvanic corrosion between dissimilar metals, and verify thermal expansion consistency for wide-temperature applications.
· Preload safety margin: Design precompression with a 15%–25% safety margin relative to the spring’s allowable stress, to mitigate force decay from long-term stress relaxation.
· Standardized mounting interfaces: Adopt standard thread, flange or snap-fit mounting interfaces where possible to improve customer assembly efficiency and part interchangeability.
· Component precision control: Strictly control dimensional tolerances of all matching parts (housing, plunger, etc.) to ensure consistent assembly quality and batch-to-batch force uniformity.
· Precision force-controlled assembly: Use servo force-pressure equipment for preload assembly to accurately control compression displacement and assembly force, avoiding overloading and damaging the spring during installation.
· Cleanliness control: Medical, semiconductor and food-grade assemblies must be manufactured and assembled in cleanrooms, with ultrasonic cleaning and cleanliness testing to eliminate particulate contamination.
· 100% finished product testing: Perform full inspection of output force, working stroke and appearance function on every assembled unit to guarantee outgoing quality.
· Surface treatment coordination: Coordinate surface treatment specifications across all components to avoid corrosion caused by mismatched coatings; for high-fatigue parts, control coating thickness to avoid hydrogen embrittlement risk.
· Select assemblies rated for the actual operating environment (temperature, corrosion, media); do not use general industrial assemblies in medical, food or high-corrosion conditions.
· Ensure correct alignment during installation; lateral or eccentric loads will accelerate guiding wear, cause spring deflection and lead to premature assembly failure.
· Do not disassemble factory-preloaded spring assemblies; disassembly will lose the preset preload state, and improper reassembly may cause performance deviation or safety hazards.
· For dynamically cycled assemblies, conduct periodic inspection for wear, force drift and surface corrosion, and replace upon reaching the rated service life.
· Medical-grade spring assemblies must be sterilized only by approved methods and within the rated number of cycles; unauthorized sterilization processes will cause material degradation and performance failure.