DIN 5466-1 only deals with the strength of the splines themselves and not the fatigue strength of the shaft. In that case I would look into not just how the cross-section of the shaft changes with the module of the splines, but also the fatigue notch factor if you can find some information about...
Some simple options are:
1. Shrink-fit the gear on the shaft. Usually it's easiest if the shaft has shoulders to axially locate the gear or other elements on it (or you can use sleeves as well). It's also easier to mount a shrink-fit if the shaft in front of the gear is slightly smaller so it...
Well, you asked about the efficiency of the diesel-hydraulic option so I replied w.r.t. the efficiency of a diesel-hydraulic system. Whether it's lower cost is worth it's lower efficiency is a trade-off you or your client will have to make.
W.r.t. the ease of varying engine loads at different...
The hydraulic option should not just picture the losses because of the pump and motor but because of the lines, fittings and any valves in-between as well as these losses will be higher compared to "transporting electricity". Furthermore, if you're using a variable displacement pump or motor the...
Ring gears are usually not case hardened because (usually) after hardening they need to be ground which is often not possible (or at least hard to do) for internal gears. Therefore they are either through hardened or QT and nitrided. Nitriding them will not lead to large distortions which means...
Yeah, I was thinking it only is useful if it's less than half of the size tolerance since it's radial and not diametrical. But you're correct that there are certain specific exceptions that would fit the size tolerance without fitting the circularity tolerance so it rules out those.
^I think there's 1 little mistake and that's that the maximum span would be 304.14 + 3.7 = 307.84 (since both holes can be a distance of 1.85 away from their ideal location). Same goes for the minimum span which would be 300.44. This is only taking the tolerance w.r.t. datums X, Y, Z into...
@dyahaw._
You say you used the BC that resembles a roller to take the external load into account but the external loads shouldn't have an influence on the natural frequency.
Furthermore, a beam is loaded in pure compression only theoretically, in reality the force will be off-center from the...
When I look at this drawing the only thing that seems strange to me is to have a 0.1 circularity tolerance on a feature that has a size tolerance of +/- 0.1. This size tolerance should automatically make the circularity within 0.1. It's not wrong but unless I'm mistaken it's unnecessary...
If you calculate the clamped-clamped condition you should get a higher natural frequency than the FEA result and not a lower one.
There are a lot of ways to calculate the natural frequency. Here's one based on the maximum deflection because of it's own weight.
n = k*946*SQRT(1/f)
with n =...
You have a MMC so if the hole is larger than the minimum size tolerance the position tolerance will be more than 0.2. (This is usually the design intent so I'm not saying it's wrong, just making sure you know.)
The allowed distance from the B datum is also allowed to change based on the position...
Well, we all hear the story from you, so we're biased by your opinion and your explanation. But you say this position has physically and mentally worn you down so at the very minimum it's time to have a talk about this with your boss or manager and explain your viewpoint. That's the minimum...
I think you can convert from Webster to Rockwell to Brinell with the same error as converting directly to Brinell if the conversion tables are accurate.
This is easy to demonstrate.
Conversion table:
A | B | C
1 | 2 | 3
2 | 3 | 4
etc.
Let's say you have hardness in scale A and want it in scale...
As a designer I only convert from hardness to tensile strength so the ASTM standard is useless to me.
I've to choose between ISO 18265 and SAE J417.
I've noticed with other standards that the ISO and DIN standards are usually far more detailed than American standards and this is also the case...
Some ways to make this design simpler is to scrap the round corners and cut the extrusions at an angle to make the corner. Scrap the little cross members in all 4 round corners, I don't think they're very useful. Scrap all the triangular pieces, I don't think they are very useful.
I also did a...
For gears increasing the module increases the tooth width and therefore the tooth root bending strength. I assume the same thing applies to splines.
However with splines increasing the module would increase the load on each tooth (because of the decrease in amount of teeth) which is not an...
There are ISO standards that explain how to calculate the ratings of bearings. ISO 281, ISO/TS 16281, ISO 76, ISO 15312, ISO TR 1281. There might be more.
