PDF-Arbeitsblaetter fuer RFQ-Vorbereitung
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Diese PDFs dienen der RFQ-Vorbereitung. Werkstoff, Geometrie, Paket, Ermuedung und Einbau muessen von FeTech geprueft werden.
Why stack design matters
A search for disc spring stack usually means the buyer already has a mismatch: the load is too high for one washer, the movement is too large, or the available height is too tight. One disc spring may be close, but not close enough for the assembly.
Stack design lets FeTech tune the spring pack while keeping a proven geometry family whenever possible.
What parallel stacks do
In a parallel arrangement, disc springs are nested in the same direction. The stack carries more force, but the available working deflection stays close to one spring.
Parallel packs are used when the assembly needs more clamp load but the diameter and movement window are already limited.
What series stacks do
In a series arrangement, disc springs alternate direction so the stack gains more total travel. The load level stays closer to that of one spring, but the system can accommodate more movement before reaching its working limit.
This is why series stacking is common in live loading, settlement compensation and other applications where the joint keeps moving after installation.
Where combined stacks are used
Many real projects are not a clean force-or-travel choice. By grouping several springs in parallel and then placing those packets in series, the design can raise clamp load while keeping usable movement in reserve.
That is the logic behind many valve stacks, industrial bolting packs and custom elastic assemblies.
- Parallel for more force.
- Series for more travel.
- Combined stacks when the joint needs both.
- Final design should still be checked against working deflection, fatigue target and installation tolerance.
When to use the calculator before requesting a quote
For early sizing, a calculator can show whether the stack should move toward force, travel or a combined arrangement. It will not replace engineering review, but it prevents the first RFQ from being only a guess.
The best inputs are outside diameter, inside diameter, thickness, free height, target load, available movement and the application type: valve, flange, actuator or custom preload assembly.
Haeufige Fragen
Does a larger stack always mean better performance?
No. A larger stack may add force or travel, but it can also create height, alignment, friction or load-distribution problems if it is not matched to the joint.
What information is needed to review a stack design?
The most useful inputs are required load, available deflection, installation height, duty cycle, operating temperature and whether the stack is used statically or dynamically.
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- DIN 2093 Ersatz oder kundenspezifische Geometrie
- Pakete fuer Ventile, Flansche, Aktuatoren und schwere Einsatzfaelle
- Werkstoffpruefung fuer Edelstahl, Inconel, Hastelloy, Titan oder warmfesten Stahl
Endgeometrie, Ermuedung, K4-Quelle, Reibung und Auflagebedingungen erfordern technische Bestaetigung.