Week 14 challenge

Assemble and apply GD&T to the butterfly valve assembly drawing

DISCREPTION & PROCEDURE

• In NX software create a new ASSEMBLY.
• ADD all the components that created as models
• The components are

1. Body
2. Stem/shaft
3. Retainer
4. Plate
5. Handel
6. Nut
7. Screw for small hole
8. Screw for big hole.

• Now assembling all the components by using assembly constrains.
• The assembly constrains are centre axis and touch constrains.
• First assembling the stem, plate with small screws by using component move command and constrains same as moving the stem into its position in body.
• Secondly the retainer plate and the body with big screws and thirdly handle and nut.
• The assembly of butterfly valve is created.
• Now applying the GD&T for the assembly in the converted drafting section.
• A surface of the main body or ears of butterfly valve is referred as datum A to make more understandable the datum targets are created A1, A2, A3 around the three holes of diameter 47mm by the arc point-point-point command and object move command, and feature control frame created to surface for flatness of 0.25 tolerance.
• Datum B is a hole which constrain the rotational motion of assembly and apply a FCF geometric control of perpend clarity of tolerance of 0.25 mm at maximum material condition with reference to datum A.
• Datum C is a hole which constrains the motion of the assembly and apply FCF of geometric control of position of tolerance 0.25mm at MMC and with reference to datum A and B datum at MMC.
• Datum C
• Datum D is a hole which constrains the AXIS of the assembly HOLES and apply FCF of geometric control of position of tolerance 0.25mm at MMC and with reference to datum A and B datum at MMC Datum C at MMC.
• The opposite surface is given by feature control frame of profile of surface with respect the datum A and tolerance of 0.5 at MMC with respect to datum A datum B at MMC datum C at MMC.
• Applying a FCF at each of opposite third hole of geometric control of position or axis of tolerance of 0.75mm at MMC with reference to datum B and at MMC and datum C at MMC and datum D at MMC.

Conclusion:

THE ASSEMBLY OF BUTTERFLY VALVE IS CREATED AND GD&T IS APPLYED IN DRAWING SHEET.