bank proof

[danieleteo]

Hello everyone, I am new....I would like to expose you my problem:
I end up making a project of a test bench (which we failed to finish by the end of the school year) =(
I can't find some information:
Suppose we have a counter (a steel table s 275) I have to do a distension treatment as it will then there will be all components suitable for testing a brake. these components will be connected through triggers.
all the trees of these components must have a coaxiality less than tenth of mm.
I would like to verify this tolerance.
which tool I have to use (the trees are small so I would have thought of using a laser system...but I can't understand how they work and how to place them... do you have any brand that I can then lean on? ? ? )

other question:
treatment of distension
the bench is composed of profiles always in s 275, finish the phases of welding I do a treatment of distension (some call it finding of distension), know to what temperatures it has to be but I can not understand how long it has to stay in the oven....the mass of the bench I know...there are no formulas or cmq graphics to refer to??? I can't find them.
I thank you very much for the answers... and I apologize if for any of you these questions may be trivial. ...

 

[meccanicamg]

Hello everyone, I am new....I would like to expose you my problem:
I end up making a project of a test bench (which we failed to finish by the end of the school year) =(
I can't find some information:
Suppose we have a counter (a steel table s 275) I have to do a distension treatment as it will then there will be all components suitable for testing a brake. these components will be connected through triggers.
all the trees of these components must have a coaxiality less than tenth of mm.
I would like to verify this tolerance.
which tool I have to use (the trees are small so I would have thought of using a laser system...but I can't understand how they work and how to place them... do you have any brand that I can then lean on? ? ? )

other question:
treatment of distension
the bench is composed of profiles always in s 275, finish the phases of welding I do a treatment of distension (some call it finding of distension), know to what temperatures it has to be but I can not understand how long it has to stay in the oven....the mass of the bench I know...there are no formulas or cmq graphics to refer to??? I can't find them.
I thank you very much for the answers... and I apologize if for any of you these questions may be trivial. ...

Hello, danieleteo,
I propose that the trees even if they are disallined of 0.5 mm do the same. you can definitely use the appropriate type joints and characteristics to compensate for the descaling.

the treatment of distension is carried out in the electro-welded carpenters made with stems of strong thicknesses (15-40 mm) to cancel the effects of internal tension caused by the cooling of welding. If you have the whole thing made by pierced tube and do not go to remove by milling large volumes (top magari if made with piastrone) I would say that it may not be necessary to treat distension.

If it's a brake test bench, I'd say you can't put it in the small tempering oven, so you'll have to run it to specialized companies. Treatmentists are the most indicated people to be given delucidations regarding temperatures and calculation of times.

for a steel s235jr en 10025-2: 2004 it is recommended to carry out distension at a temperature of 490-600 °c (light sourcefin steels).

the time of thermal treatments is never mensed as it depends strongly on the alloy and experience gained on a large series. I'm also looking for something to calculate the times but the only thing I have is the following:
times of stay at tempra temperature:Construction, carbon and low-alloy steels: a few minutes
medium alloy steels: at least 15 minutes
low-alloy carbon tool steels: 0.5 minutes per mm thick, with a maximum of one hour
high-alloy chrome steels: 0.8 minutes per mm, with a maximum of one hour
Steels for hot processing: half an hour maximum, given the low amount of carbides
quick steels: they are heated to the highest temperature, so it is necessary to limit the stay to the minimum (time dependent on the thickness)

say that you could calculate the power of the oven, knowing the mass of the frame and the thermal conductivity know after how many minutes the table is all at constant temperature and to make them leave the time.

If none of us knows how to give you a response you can always feel a treatmentist or send an email to the unsider and since you are a student will give the right tips or they will contact you with an associate metallurgist.

 

[MBT]

What if it was a distension with vibrations?
However, if you need high precision, I think that the best solution is to rely on someone who has a goddess or other similar device.

 

[zeigs]

we to verify the alignments we use a tool of the cemb, it is based on two photocells with lasers that mount on the joints and sampling the relative positions along a complete turn tells you how disallined and the corrections to be made. theoretically it can reach the cent. and the trees are not so small (60-100 mm). to get to the tenth we usually use two comparisons and the outlet. if trees are not infinitesimal you can think of a tool for purpose

 

[danieleteo]

thank you very much for the advice....... fortunately there are people like you who through their experience can help inexperienced people or in any case in difficulty like me.... thank you

 

[danieleteo]

cmq for correctness against you, we have imposed a maximum misalignment of one cent (coaxial error)