cutting stress and bending moment on tree

[meccanicamg]

If it is the turret of a lathe, I expect it to be extremely oversized for the efforts, as it must be very rigid, then I would make a dimensioning rigidity, and then purely for formality, a verification of tensions

Probably not a lathe turret but it is a mold part for plastic components.
so you will also have to tell us if the cutting effort is at 200°c or at room temperature.

 

[Beth]

Probably not a lathe turret but it is a mold part for plastic components.
so you will also have to tell us if the cutting effort is at 200°c or at room temperature.

This is the shouldering of a mould for thermoplastic material, the cutting effort takes place at room temperature.

 

[meccanicamg]

This is the shouldering of a mould for thermoplastic material, the cutting effort takes place at room temperature.

So now is it clear how to proceed? I would have expected an answer about it since there are posts with formulas before...
if the stress is at room temperature is better because the mechanical characteristics are higher than at 200°c.

 

[Beth]

So now is it clear how to proceed? I would have expected an answer about it since there are posts with formulas before...
if the stress is at room temperature is better because the mechanical characteristics are higher than at 200°c.

Hello excuse for waiting, I wanted to quantify the forces at stake but I'm not in the office.
I'll answer you in the day.

Thank you.

 

[Beth]

Hi.
we are talking about 7300kn on each face.
after giving you this last date I wait for your comment otherwise
proceed with the analysis of your formulas

Thank you.

 

[biz]

7300kn

Sure? I'd say you're on the nerve if not worse.

 

[Beth]

in the first approximation, Vedial as a beam, is a gross pattern as it is a rough body, but at least it gives you an order of magnitude of the numbers in play

In fact, the one represented in the annex is not the only shouldering present, there are others and of different form, omitting to say it in fact I came out of the track and I apologize.
Would it be better to simplify the problem by asking the question to what force resists the turret to stand in safety of cutting?

 

[meccanicamg]

We have a hard time getting clear ideas and we're risking to deal with cazzum... just to do.
I believe that a designer should put them in coldness and lucidity and do an overall analysis.
forces at stake, points of reaction, do they cooperate?

 

[Beth]

We have a hard time getting clear ideas and we're risking to deal with cazzum... just to do.
I believe that a designer should put them in coldness and lucidity and do an overall analysis.
forces at stake, points of reaction, do they cooperate?

I can tell you, you're right.
now I try at least to understand your formulas.
I live

Thank you.

 

[Beth]

for the cut background in rectangular section I bring back the formulas that you use normally.
View attachment 64352the mechanical characteristics of the 42crmnmo7 qui and also qui and depending on the state of supply you will have a breaking load and a yield.

the permissible cutting voltage is calculated as:[math]\tau_{adm}=0,58•\frac{rs}{k}[/math]where k should be a safety factor at least greater than 1.5. but everything depends on the application and what it has to do.

How much are the forces at stake?

Hello,

I apologize so much for the delay, under I tried to enter some data.
I hope I didn't write cauliflower.

 

[meccanicamg]

I see a beautiful image with numbers written but you didn't write or results. then misses the conclusion.
on the square hoof you will have to compose orthogonally the two cutting tau. two orthogonal vectors are added vectorally with pitagoras and not as algebraic sum.
rm is the traction breaking load.
rp0,2 or rs is the yielding load that for tenacious materials is identified with the stretching of 0,2%.

 

[Beth]

hi, I didn't put the results because I wanted to be sure of the correctness of filling out the formula first.
in fact as you have emphasized I have made mistakes both in the first formula and in the second.
hoping not to have made cauliflower reproducing correct image below.in green I put the modified elements.
What do you think?

 

[meccanicamg]

hi, I didn't put the results because I wanted to be sure of the correctness of filling out the formula first.
in fact as you have emphasized I have made mistakes both in the first formula and in the second.
hoping not to have made cauliflower reproducing correct image below.View attachment 64626in green I put the modified elements.
What do you think?

Now formulas and numbers are consistent....I would say that for irrisorial forces, that block is ultra mega oversized.

 

[Beth]

I thank you very much for your comments and patience,
One last thing if I can...
Why are two values put in the table ?

 

[Stan9411]

is written in the line under what you highlighted.... one is the value at room temperature ... the other is measured at 200 degrees and of course is lower

 

[Beth]

You're right.

I apologize and thank you