spring
Enable an agent to recognise a mechanical spring, assess its elastic behaviour and condition, and determine appropriate loading, installation, adjustment and replacement actions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise a mechanical spring, assess its elastic behaviour and condition, and determine appropriate loading, installation, adjustment and replacement actions.
A mechanical spring is a component designed to deform elastically under load, store recoverable mechanical energy, and exert a restoring force or torque.
It can be Compare candidate springs against required force or torque over the intended travel.; Check seating, end engagement, guidance and clearance for a proposed installation.; Measure restoring response and residual deformation using an appropriate controlled test.; Assess whether observed defects or service exposure require inspection or replacement.; Determine the prerequisites for safely unloading, restraining, adjusting or removing the spring.; Evaluate replacement compatibility using response, interfaces and operating limits together..
Distinguishing features
Its intended function uses recoverable deformation to produce a restoring force or torque; incidental flexibility in an otherwise rigid part is insufficient.
Its operating description relates force to displacement or torque to angular deflection, rather than specifying only a structural load capacity.
It stores recoverable mechanical energy under load; a damper is primarily characterised by energy dissipation.
It has an identifiable working deflection and return behaviour; permanent deformation is generally a limit or fault rather than its operating principle.
Its restoring action arises from its elastic configuration without requiring a powered actuator to command the return motion.
Scope
+ Spring forms, including helical, leaf, disc, spiral and flexure forms
+ Elastic force-displacement or torque-angle behaviour and stored energy
+ Material, geometry, end features and installation interfaces
+ Preload, permitted travel, operating environment and service life
+ Condition assessment, stored-energy handling and replacement compatibility
- Complete suspension, valve, clock or other mechanisms that use springs
- Dampers whose primary function is dissipating motion energy
- General material elasticity independent of a spring component
- Manufacturing machinery and processes as independently modelled things
- Seasons and natural groundwater outlets
Characteristics
- Spring form and loading mode
- Helical, leaf, disc, spiral or flexure; compression, extension, torsion or bending Determines which geometry, loading relationships and installation constraints apply.
- Force-displacement or torque-angle characteristic
- N versus mm, or N·m versus rad, with loading direction and test conditions Shows the restoring response, including nonlinearity and differences between loading and unloading.
- Spring rate
- N/mm or N·m/rad; identify tangent or secant rate and applicable interval Supports matching to a mechanism without assuming constant stiffness across all travel.
- Free geometry
- Applicable free length, diameter, thickness, width or end angle in mm or degrees Establishes the unloaded reference and physical fit.
- Installed preload
- N or N·m at a stated installed length or angle Determines initial working force and energy that may remain before disassembly.
- Permitted working envelope
- Minimum and maximum force or torque, deflection, temperature and applicable cycle conditions Bounds operation before interference, instability or material limits become unacceptable.
- Material and surface treatment
- Specified material grade, heat treatment, coating and surface treatment where known Affects elastic response, fatigue resistance, corrosion susceptibility and temperature suitability.
- End and support interfaces
- Seats, hooks, eyes, tangs, clamps, guides or mating spring elements Determines load transfer, restraint and compatibility with the host mechanism.
- Condition
- Unassessed, within verified limits, permanently set, cracked, corroded, worn or fractured Connects observed defects and measured changes to permitted continued use.
- Service exposure
- Cycle count, load range, dwell time in h and temperature history in °C where available Supports assessment of fatigue and time-dependent force loss.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.spring-location
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 29 questions.
Spring identity and form Establishes the mechanical sense, spring family and elastic element being modelled.
The name spring covers unrelated senses and mechanically different forms that cannot share every assessment rule.
Elastic function
Identifies the restoring action that makes the component a spring.
Intended restoring action
Record the intended elastic action and distinguish it from incidental flexibility or primarily dissipative behaviour.
- What recoverable deformation produces the intended restoring force or torque? definition
- Which evidence distinguishes this component from a flexible structural part, damper or powered actuator? boundary
Form and component boundary
Classifies the physical form and locates the spring within its surrounding mechanism.
Spring family and owned element
Record the spring form, loading mode and whether the identified element is a single spring, a pack or an integral flexure.
- Which spring family and external loading mode describe this design? definition
- Where does the elastic element end and its seat, housing, guide or host mechanism begin? boundary
Elastic response and energy Describes restoring behaviour across the working travel and the energy associated with loading.
Physical fit alone cannot establish whether a spring delivers the required response or can be handled safely.
Load-deflection response
Captures measured or specified response with its reference conditions.
Working response curve
Record force versus displacement or torque versus angle, including applicable tolerances, preload and loading history.
- What response curve and tolerance apply over the intended working travel? measurement
- Which drawing, supplier specification or test establishes the curve and its temperature, rate and reference position? provenance
- Does the response require accounting for initial tension, changing rate or loading-unloading hysteresis? measurement
Travel limits and stored energy
Identifies usable deflection, limiting conditions and recoverable energy.
Verified operating envelope
Record working limits separately from physical travel limits such as coil contact, disc flattening or end interference.
- What deflection limits apply, and which are set by stress, contact, buckling or attachment capacity? measurement
- How much recoverable energy remains at the installed position, and how was it determined? measurement
- What restraint and unloading sequence are required before an attachment is released? action
Geometry and mechanism fit Defines spring geometry, load-transfer interfaces and behaviour within an assembly.
Springs with similar nominal rates can differ in clearance, stability, end loading and assembly response.
Free shape and attachments
Records the dimensions and end features needed to seat and load the spring correctly.
Fit and load transfer
Capture family-specific dimensions and attachment details without substituting appearance for verified compatibility.
- Which free dimensions, end angles, winding direction and tolerances control fit for this spring form? measurement
- How do the seats, hooks, eyes, tangs or clamps transfer load and constrain movement? boundary
Installed configuration
Connects assembly arrangement to preload, stability and effective response.
Guidance and spring arrangement
Record orientation, guidance and any series, parallel or stacked arrangement that changes installed behaviour.
- What installed length or angle sets the preload, and what clearances remain throughout travel? measurement
- Do guides, mating surfaces or neighbouring springs introduce friction, side loading or instability? boundary
- Which assembly features must be preserved when replacing or repositioning the spring? action
Durability and service decisions Relates material, exposure and observed condition to inspection and continued use.
A spring may still fit and return while having lost force or accumulated damage that changes its suitability.
Material and loading history
Identifies the evidence needed to assess fatigue, relaxation and environmental degradation.
Durability basis
Record material and treatment evidence alongside cyclic loads, sustained deflection and environmental exposure.
- What evidence identifies the material grade, heat treatment and relevant surface treatments? provenance
- What load ranges, cycle counts, dwell periods and temperatures describe the intended or recorded service? measurement
- Which spring-specific or application-specific standards, issuing bodies and editions govern qualification? provenance
Condition and intervention
Turns inspections and response measurements into bounded service decisions.
Acceptance and replacement
Assess permanent set, force loss, cracks, corrosion and attachment damage against documented acceptance criteria.
- What changes in free geometry or force at a reference deflection indicate deterioration? measurement
- Which observed defects or measured deviations require removal under the applicable acceptance criteria? action
- What evidence supports replacement equivalence in response, end geometry, material suitability and service life? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The mechanical-component sense is inferred from PHY.OBJ and the batch context; no recorded sense confirms it.
- No universal typical measurement ranges are supplied because spring dimensions, stiffness, travel and load capacity vary widely by application.
- The named standards are recalled without consultation; check current editions and applicability. A constant spring rate and Hooke's-law response should not be assumed for every spring.
- Which of these check these first hold for the sense of spring this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Helical compression spring
- Helical extension spring
- Helical torsion spring
- Leaf spring
- Disc spring (Belleville spring)
- Constant-force spring
- Which of these kinds and varieties hold for the sense of spring this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Manufacturer part number - Manufacturer-specific alphanumeric designation - Identifies a catalogue design; dimensions, material, load characteristics and end configuration are needed to establish interchangeability.
- Which of these identifiers and schemes hold for the sense of spring this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- ASTM International ASTM A228/A228M specifies steel music spring quality wire; it is a material specification rather than certification of a finished spring.
- ASTM International ASTM A313/A313M specifies stainless steel spring wire.
- Which of these standards and regulation hold for the sense of spring this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Supporting loads and providing compliance in vehicle suspensions.
- Returning valves, switches and mechanisms to a defined position.
- Maintaining preload or contact force in assemblies.
- Storing mechanical energy in clocks and winding mechanisms.
- Measuring force through calibrated elastic deflection.
- Which of these real-world use hold for the sense of spring this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Fatigue cracking and fracture under repeated loading.
- Permanent deformation following overload or operation beyond the intended elastic range.
- Stress relaxation or creep that reduces force, especially at elevated temperatures.
- Corrosion and corrosion fatigue that weaken the spring.
- Sudden release of stored energy, potentially ejecting components or causing pinch injuries.
- Which of these failure modes and hazards hold for the sense of spring this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Catalogues may specify dimensions and spring rates in millimetres and N/mm or inches and lbf/in; nominally similar products require specification checks.
- Which of these regional variation hold for the sense of spring this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Damper - A damper primarily dissipates mechanical energy, whereas a spring primarily stores and returns it; an assembly can combine both functions.
- Elastic material - Elasticity is a material property; a spring is a component whose geometry and material deliberately provide a restoring response.
- Natural spring - A natural spring is a location where groundwater emerges, rather than a mechanical component.
- Spring season - The season is a period of the annual climatic cycle, rather than a physical device.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of spring this model covers, and on what evidence? provenance
What the second pass must settle
- Does registry item vr.tr.spring-q102836 explicitly cover the mechanical component sense, and what authoritative definition should anchor its boundary?
- Should gas springs, elastomeric springs and magnetic restoring devices share this entry or link to neighbouring models?
- Which spring families require specialised extensions for behaviour such as disc-stack friction, constant-force strip action or integral flexure motion?
- Which standards and issuing bodies apply to each included spring family and application, and what dimensional, load and life ranges can research support?
- What application-specific evidence is required to set inspection, rejection and replacement criteria when load history or manufacturer limits are unavailable?