T-slot structural framing: Difference between revisions
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File:T-Nut - Installed in a T-Slot.png|T-nut (red) installed in a T-slot |
File:T-Nut - Installed in a T-Slot.png|T-nut (red) installed in a T-slot |
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== Calculating load capacity and deflection == |
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Formulas depend on the type of fastening of the aluminium profile:<ref>{{Cite web |title=Aluminium profile load capacity {{!}} Blog - Tuli experience |url=https://www.tuli-shop.com/blog/aluminium-profile-load-capacity.html |access-date=2023-09-26 |website=www.tuli-shop.com}}</ref> |
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=== '''Free support from both sides (e.g. swivel support / joint from both sides)''' === |
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[[File:Aluminium profiles - free support from both sides.jpg|alt=Free support from both sides (e.g. swivel support (joint) from both sides)|frameless]] <math>\sigma=\frac{F \times L}{4 \times W}\leq K</math>, <math>f = \frac{F \times L^3}{E \times I \times 48}</math> |
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=== '''Fixed support from both sides (e.g. fixing to the wall from both sides)''' === |
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[[File:Aluminium profiles - fixed support from both sides.jpg|alt=Aluminium profile with fixed support from both sides (e.g. fixing to the wall from both sides)|frameless]] <math>\sigma=\frac{F \times L}{8 \times W}\leq K</math>, <math>f = \frac{F \times L^3}{E \times I \times 192}</math> |
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=== '''Fixed support from one side / console (e.g. fixing into the wall from one side)''' === |
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[[File:Aluminium profiles - fixed support from one side.jpg|frameless]] <math>\sigma=\frac{F \times L}{W}\leq K</math>, <math>f = \frac{F \times L^3}{E \times I \times 3}</math> |
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where: |
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* <math>\sigma [\frac{N}{mm^2}]</math> is the bending tension |
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* <math>F [N]</math> is the [[force]] or load |
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* <math>L [mm]</math> is the free profile length |
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* <math>W [mm^3]</math> is the moment of resistance |
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* <math>I [mm^4]</math> is the moment of [[inertia]] |
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* <math>f [mm]</math> is the deflection |
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* <math>E [\frac{N}{mm^2}]</math> is the [[Elastic modulus|elasticity module]] |
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* <math>K [\frac{N}{mm^2}]</math> is the max. bending tension with values: |
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{| class="wikitable" |
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|+Bending tension |
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! |
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!Constant load |
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!Pulsating load |
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!Alternating load |
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|- |
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|<math>K [\frac{N}{mm^2}]</math> |
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|100 |
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|40 |
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|30 |
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|} |
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== See also == |
== See also == |
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Revision as of 11:00, 26 October 2023
 | This article needs additional citations for verification. (April 2022) |
T-slot structural framing is a framing system consisting of lengths of square or rectangular extruded aluminium, typically 6105-T5 aluminium alloy, with a T-slot down the centerline of one or more sides.
It is also known under several generic names, such as aluminium extrusion, aluminium profile and 2020 extrusion if the cross-section is 20x20 mm, alongside brand names, such as 80/20 framing.[1]
While the precise history of the T-slot framing system is not known, advancement in extrusion press technology in the early 1950s allowed for economic production of aluminium profiles,[2] and examples of use can be found from the early 1960s.[3]
Although no published standard defines the system, it is produced in a series of conventional sizes which allows for compatibility between manufacturers.
There is a variation on T-slot profiles known as V-slot rails where V-slot wheels are slotted into the V-shaped channels of the framing for linear motion in a 3D printer or other CNC machine.
Profiles
T-slot framing is divided into metric and fractional (imperial) categories. The T-slot is always centered along the long-axis of the piece. Pieces are available in each series with a square cross-section. Rectangular cross sections are also available which measure x by 2x (where x is the defined width) - e.g. 40mm by 80mm for 40 series.
| Profile type |
Profile name |
Profile size |
|---|---|---|
| fractional | 10 series | 1" |
| 15 series | 1.5" | |
| metric | 20 series | 20 mm |
| 25 series | 25 mm | |
| 30 series | 30 mm | |
| 40 series | 40 mm | |
| 45 series | 45 mm |
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CAD model of a rotating T-slot nut used with aluminium T-slots/ T-track/ extrusions -
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T-nut (red) installed in a T-slot
See also
References
- ^ "Find out About Our Mission and Vision Here at 80/20". 8020.net. Archived from the original on 2022-03-06. Retrieved 2022-05-15.
- ^ Bauser, M; Sauer, G; Siegert, K (2006). Extrusion (2 ed.). Materials Park, Ohio: ASM International. p. 6. ISBN 978-0-87170-837-3.
- ^ US patent US3143981A, Leslie E Tassell, "Demountable partition", published 1964-08-11, issued 1964-08-11, assigned to Tassell Hardware Co