assembly surface defination

[MaurizioR.]

Hello, guys.
I'm mauritius and I'm dating the night of mechanical experts. Then I ask you the problem: having to select the face of a contact assembly on catia v5 r20, since the face in question is a spring, the program makes me select only the surface of the circular profile i.e. the circle whose diameter defines the thickness of the spring, which I do not need..piuttosto I would need to select the face of the last spira in order to make it tangent to the surface that I want ..how do I?:confused

 

[Steel59]

Perhaps you cannot use the surface of the coil to ensure the bond, sometimes it is essential to create additional plans to use as a reference for the bond. happens that to generate such plans you also need points. I explain: create a tangent plane to the diameter section (oftensor) of the last spiral. to do so maybe you need to generate a point on the circumference of the diameter. the point generates a plan that is parallel to the sup. of support and that goes for that point. made the plan you can assemble the spring with the offset bond ( placing this at zero). you will probably also need the vertical axis on which the spring develops to create a subsequent bond.

 

[panormus]

hi steel, can I ask you to post a small example, image or part that is?

 

[marcof]

Hello, guys.
I'm mauritius and I'm dating the night of mechanical experts. Then I ask you the problem: having to select the face of a contact assembly on catia v5 r20, since the face in question is a spring, the program makes me select only the surface of the circular profile i.e. the circle whose diameter defines the thickness of the spring, which I do not need..piuttosto I would need to select the face of the last spira in order to make it tangent to the surface that I want ..how do I?:confused

I do not use catia but it seems to me that it is more than another problem of geometry that you have under your hand, that is your spring ends with the thread of the last circular section spire and perhaps even with perpendicular pattern to the axis of the spring; In that case it is obvious that the porgram cannot establish tangence with the mounting surface of the spring. compression springs normally have the last worked coil to create a flat surface.Do that work in your spring and I'm sure you'll be able to create the coupling without problems.

 

[ferrezio]

as it has already been said you have to add descriptive geometry that allows you to place the part of your set.
as you see from the photo you can axle and two extreme points.

These geometries can be published and through the concise bond you can position it in the axieme (concidence point, point-plan. point-surface).

Hi.

 

[panormus]

but the section of a coil perpendicular to the axis may not generate a sufficient surface to be connected (really) to a support. I think it depends on the edge.

 

[marcof]

but the section of a coil perpendicular to the axis may not generate a sufficient surface to be connected (really) to a support. I think it depends on the edge.

No.
any cutting of the edge on a perpendicular plane to the axis of the spring generates a planar surface that the cad recognizes as valid for a bond between the eligible ones for a planar geometry.
It is assumed however that the modeling reflects the shape of the real spring.

 

[panormus]

No.
any cutting of the edge on a perpendicular plane to the axis of the spring generates a planar surface that the cad recognizes as valid for a bond between the eligible ones for a planar geometry.
It is assumed however that the modeling reflects the shape of the real spring.

no to what is reported sorry?
I spoke "extension" of planar surface; that any cut with planes generates a flat surface seems obvious to me.

 

[marcof]

no to what is reported sorry?

"no" is reported exactly to what you wrote and that I had quoted you and that I will take you back below where what you call "section" I called cutting being the same concept referred to a feature to be applied to the end of the coil

but the section of a coil perpendicular to the axis may not generate a sufficient surface to be connected (really) to a support. I think it depends on the edge.

But you have objected to me that:

I spoke "extension" of planar surface; that any cut with planes generates a flat surface seems obvious to me.

Sorry, but the word "extension" did not use it and however the more or less extended surface concept has nothing to do with the fact that that surface, if present, can be used for a coupling. just to point out, you spoke of "pira pass", but that does not affect the fact that the planar surface is generated (see image) and can be used for coupling and I repeat that the cutting cad with a plan that intersects the model generates, contrary to what you said, a surface always enough for coupling.

 

[panormus]

I'm sorry.
what you posted confirms that the cutting surface also depends on the step (the number of edges at equal length of the spring)
I love you.

 

[marcof]

thousands.: -d

Actually, I should be the one to invoke my mother... you know how to tempt supposte (I miss why) but the tip breaks you continuously

what you posted confirms that the cutting surface also depends on the pitch

No look, you must have misunderstood. read again. what I've posted shows exactly the contrary of what you argued, that (and I quote you again):

the section of a coil perpendicular to the axis may not generate a surface sufficient to be connected (really) to a support. I think it depends on the edge.

Does the surface depend on the step? What, of the surface, depends on the step? You have to explain. so many things of that surface can depend on the step, for example shape and amplitude of the surface, certainly not the existence of the surface itself. since the surface you see is generated for any spring step (if you want me to show you with a step of one hundred meters instead of 200 mm...) there is no possibility that that spring cannot be properly bound on its support plan. It does not exist in a case like this, in the cad, a surface not enough. if the cut intersects the model the surface is generated correctly and the cad can use it to set a constraint of the smooth ones.
but all this was already chairissimo to my post #7 and I reiterated it further and illustrated it to post #9.

 

[panormus]

but the section of a coil perpendicular to the axis may not generate a sufficient surface to be connected (really) to a support. I think it depends on the edge.

arri maaaatri miiiia.. ;
from on marcof... so pignolo, you comment all punctually every time and then you leave me a comment on I love you...:biggrin: ?? ?
Of course it takes patience with you.. (also with me is it true) but do you always do this or am I special?

and vabbò da mi ancora di patience (as you do when you help me) and I answer you.

everything started with the above post.. Damn me and all the questions I ask. .

Let's see if I can explain myself better.. But promise me one thing: that you try to understand the meaning of what I want to say without dwelling too much at every single word as I was a lawyer looking for the comma to engrave, lust, intorate,.mmhh does not come to me the term, .. the plaintiff.

what I posted, if you read calmly, with friendship and serenity, meant: the section (cut) of a coil (a 360° winding) perpendicular to the axis (of the whole spring, what even ferretious reported to post #5) may not generate a sufficient surface (i.e. a sufficient extension, see also your images) to be able to be connected really to a support (a support plan). I think it depends on the pitch of the coil (because if at the same thickness of metal wire that constitutes the spring and at the same length of the axis of the spring we reduce the edges, the perpendicular cutting to the axis generates a flat surface of potential contact/wine via minor :finger:

♪ I did it! ! ! ! ! !
We hope so that everything will be clarified, because if you tell me that it is not clear I renounce. :tongue:

Give me your hand, brother?

 

[igor azara]

offset test with zero value because the contact constraint on the surface is a heavier bond indispensable in the analysis f.e.m. of assembled. If you simply have to bind the assemblies better offset also for, at least as far as I know, contact on the surface at least to the relase 17 requires flat surfaces.as last beach uses of the reference plans created ad hoc.