[ISO 3601] - [FAMILY TABLE] - [O-ring]

icub-tech-iit / cad-libraries

In this repository we store the CAD libraries and the PTC Creo configuration files.

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[ISO 3601] - [FAMILY TABLE] - [O-ring] #108

Open fiorisi opened 2 years ago

fiorisi commented 2 years ago

Description	Field
Datasheet component	ISO-3601-1-2008.pdf
Project	Generic component
Alias Creo	TBD
IIT-Code	TBD
Applicant	Mattia Salvi, @salvi-mattia
Supervisor	Ugo Pattacini, @pattacini
Maintainer	Marcello Savoldi, @marcellosavoldi
Coworkers	@icub-tech-iit/silo-mech

Attachment:

Notes:

Checklist:

Complete the checklist in order to proceed with the request.

[ ] Created the Alias following the standard convention.
[ ] Added, if necessary, the source files (STEP, IGS, etc), the links/datasheets/drawings or other information used to create the library part.
[ ] File imported using the Creo start part commercial.
[ ] Checked mass properties.
[ ] Checked if one special case applies to this component.
[ ] Converted the files with the EDU-COM license.
[ ] Created IIT code in WINGST with manufacturer and at least one supplier.

fiorisi commented 2 years ago

Created also dedicated section in our technical specification standards: https://github.com/icub-tech-iit/cad-mechanics/wiki/Technical-specification-standards#o-ring

fiorisi commented 2 years ago

CAD model dimensions should follow the technical specification:

Given our application (robotics) I would select the "industrial application" class B O-rings. Are also easily available from SKF: https://www.skf.com/group/products/industrial-seals/hydraulic-seals/o-rings-and-back-up-rings

Unless we have strict tolerances requirements I would select the ISO3601-3 acceptance criteria defined by the Grade N.

For the designation we can follow the technical specification:

I would also add the material to the designation. As an example for an NBR O-ring we can have: O-ring designation_ISO1629_NBR_SHORE-A70

Which is too long (max 31 characters)..

What do you think @salvi-mattia?

fiorisi commented 2 years ago

@salvi-mattia selected the RS code 196-5457 which is a NBR O-ring, but it doesn't follow the ISO3601. If none of the O-rings in ISO3601 are suitable, then I would name the O-ring following the classical procedure for standard commercial components.

salvi-mattia commented 2 years ago

i guess the second one could apply

immagine

fiorisi commented 2 years ago

Decision made

@salvi-mattia creates the part that best fits his design following the standard procedure for commercial components.
I will create the ISO3601 family table with at least one instance and commit it.
@icub-tech-iit/silo-mech if you need O-rings please check first if one belonging to the ISO3601 fits your needs and then create the associated instance in the family table. If none of the O-ring defined in the ISO3601 fits your design, then create it as a standard commercial part.
As material I would suggest to use only the ISO1629_NBR_SHORE-A70.