tolerance model measures

[Jovanz]

Good evening to all,

It's all tonight that I'm trying to figure out if you can see the tolerated size instead of the normal ones on a 3d sw model. I make an example to make me understand better: I drew on a plate a hole of 4 mm diameter, but the carpenter asked me if gently the holes I make them with a tolerance in more than 0.1 mm. Does this mean that in model 3d I have to change all holes to 4,1 mm or is there a way for sw to recognize the tolerated size of the hole of 4mm?

Thank you.

 

[MassiVonWeizen]

I would say that you decide the size of the hole and that tolerance must have because you know the function of the particular in the whole project and the carpenter must stick to what is reported on the design.
if you indicate a 0/+-0.2 on the hole from 4 can make the hole from 4.1, if you indicate 0/+0.05 means you need that tolerance and can not make a hole 4.1
If a precise tolerance is not indicated, the general tolerance is valid and therefore if you do the hole at 4.1, with a general tolerance m he can do it from 4.2 and maybe wrong the particular but be still on the side of the reason.
if you want in solidworks you can add tolerances directly into the model via annotations or dimexpert or when you have to put tolerance directly into the value, but you can't make a 4mm hole and tell it represents it from 4.1

 

[meccanicamg]

Of course people are strange strong. drawings of i learn to do and quote according to regulations. you have a nominal size and tolerance. This is the starting point. may be that the question is different: Mr. carpenter, who cuts lasers as well as holes, to save money and not to go fresa, is aware that with the laser a hole diameter 4 on the dxf is cut smaller as the thickness of the sheet with equal cutting edge. orbene, in order not to break the bales to change the dxf, asks that a dxf be supplied with the holes geometrically 4,1. orbene, according to norm, a number is a number and as such, it can be considered that the nominal diameter is 4,1 and the tolerance associated with it +|- 0,05 or 0|+0,05 or whatever you want. Of course, in normal use the nominal diameter value is 4. These things usually happen in the automation and assembly sector where there is no tolerances but we design dry with the specified nominal cents, hole 40,00 and tree 39.95 for example to want to realize with alestore in h7 the hole and instead -0.05 on the pivot through turning. when you have templates, it is useless to give tolerances but, using the tool machine's ability to respect 0.01 mm, you can give the dry values to which to get with the processing. Of course this philosophy depends on the sectors.

I arrive from both sectors, and now that I am in heavy mechanics I have broken the boxes of writing on the hole of a spacer 50 +0,1|+0,2 that I put so much on so many substantives.... then I write or 50,1 or 50,2... so it should be turned.... and general tolerance on the design of +|- 0.1 not if the law no one.... but it would be good

 

[meccanicamg]

If the laser cut carpenter you have to give it the dxf with the holes directly d4,1. if you give it the drawing in paper you will have d4 0|+0,1. You have to figure out what he wants and do what.

 

[Jovanz]

I thank you first of all for the answers that have been obtained. My question arises from the fact that coming from inventor, in the latter there was the possibility to change the nominal dimensions of the model in those tolerated through the window "parameters". see here:

this operation in my opinion is useful in case you want to change the diameter of the nominal holes in the tolerated ones and save the ready dxf to send to laser cutting.
in a few words my question is to know whether there is also an option similar to that of inventor in sw.

 

[meccanicamg]

It seems absurd to have to parameterize with only variable the holes but can be done on all the parametric cads.

 

[Jovanz]

It seems absurd to have to parameterize with only variable the holes but can be done on all the parametric cads.

You're right. better go to change one to one each hole (especially if they are a thousand), save in dxf and then return to give each its nominal share.

 

[MassiVonWeizen]

You're right. better go to change one to one each hole (especially if they are a thousand), save in dxf and then return to give each its nominal share.

If you have a thousand holes, but even a dozen, and make a function for each one you have some gaps. Or maybe you wanted to be ironic?

really you have, at least, two better roads:
1 in solidworks create a global variable and holes instead of quoting them normally by giving them the variable, modify the variable and update the model by changing all holes
2 make the model with nominal holes and carry it in dxf, open the dxf and select all holes with quick selection and change the properties

 

[Jovanz]

I will eventually proceed in this way. by consulting other discussions and sites it seems that sw does not have a management of tolerances within the part as in inventor. This property is convenient to me when you have to export a model with tolerated measures while fast reporting it to its nominal quotas.

 

[meccanicamg]

and instead there is also in solidworks. if the holes do it with the creation wizard holes you have in the tolerance of the wide, narrow and normal hole and if the tenths change on the nominal. However, the concept of all this remains a caga.

 

[cacciatorino]

This function is convenient especially in assembly environment, to check how assembly behaves by pushing all tolerances on one side or another. I know it's pro/e, I didn't think inventor had this function.