Herramientas prácticas para trabajos de precisión
Desarrollador de Patrón Plano de Hélice / Barrena Sinfín
Desarrolle una plancha de taller en sector anular para una vuelta de hélice de tornillo sinfín, a partir del diámetro exterior, el diámetro del eje y el paso.
Calcule el diseño, revise el diagrama y luego imprima el resultado para el taller o la obra.
Optional circumferential stock for trimming or joining.
How it works
How it works: one turn of each flight edge is treated as a helix. Its length is √((πD)² + pitch²). The two helical lengths become the outer and inner arcs of an annular-sector blank whose radial width equals half the difference between flight and shaft diameters.
Print at 100%, verify the calibration mark, cut the sector, then form it to one pitch around the shaft.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Flight outside diameter
- 300 mm
- Shaft / inside diameter
- 100 mm
- Axial pitch per turn
- 250 mm
- Extra outer-arc allowance
- 0 mm
Primary result: Blank outside radius: 170.00 mm.
Before using the result
- Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
- Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
- When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.
Limitations
A screw flight is a helicoid, which is not an exactly developable surface. This is the established annular-sector workshop approximation and forming, springback, material thickness and welding can change the finished dimensions. Make a test piece before production.
The optional allowance extends the sector angle at the outer radius; it is not a radial edge, root gap or thickness compensation.
Frequently asked questions
Is the pitch the gap between flights?
No. Pitch is the axial advance of one complete turn, measured between matching points on adjacent flights.
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