Attachment Feature Creation

The given CLASS A SURFACE is to be checked properly,for making sure the given surface has no gaps.Once if it confromed ,then go for tooling axis creation , by using boundary.If any gaps we need to work on it and not we can continue with creating the,tooling axis,intial draft analysis and then b surface.And then extract the surface for creating the tooing axis.

Tooling axis creation:check the given surface completely to identify the location of tooling axis,always select the surface which is flat and when viewing from the normal view ensure all the surface can be completed with that view.

The tooling axis is created such that tha draft analysis can be done by that tooling direction.we have 3 conditions for this

1.with respect to the axis system(x,y,z axis)

2.normal to surface

3.bisecting mecthod

If any one condition is satisifed then continue with that condition.

In this challenge,let us consider the axis system,take the given surface and extract the flat surface and then make a line by using point direction method,lets check the draft analysis with the tooling direction.In this case the draft analysis is going to clear ,so we can name name the line as tooling axis.In this Below fig the surface i extracted is shown clearly and made the tooling axis.

Bisecting method:lets us check with this method also.we need to us boundary commadn over the edge of the part and make lines by suing point to point mehtod.when two lines are created at the ends use bisectign method and make a bisecting line by them.but in this case the draft analysis is not going to clear so we go for axis system.

DRAFT ANALYSIS: Once the tooling axis is completed then we can proceed with the draft analysis of the given surface.For that open Feature draft analysis and select modes to set proper mode options which shows 3 colors(blue, red,green).The green is preferable and set the draft angle to 3 deg.Then goto display option and click on analsyis under running point and check the angles on all thesides os the surface,and goto direction option selection compass and drag it into the tooling axis and fit in it such that the w face should coincide with the tooling axis.If the surface is in blue color change it to green by using flip option in the directions.Initial darft analysis of the class A suraface is shown below. in this case we take draft angle as

3deg.

CLASS B SURFACE CREATION:For creating the B surface,the given A surface is offseted to 2.5mm as given.we can observe a small patches a gap on the surface.which we are going to work on it.These pathes can be cleared by using commands like multi extract ,extrapolate,un-trim,join,trim, multi section surface.The surface is to be extrapolated all around by a minimum thickness so that when trimmed with A+C surface there will be no issues.At last we need to given fillets to the regions where they needed.

The final B surface is shown below

CLASS C SURFACE CREATION:Once the B surface is created we need to work on C surface.The c surface can be created part by part from the given class A surface.For creating the Class C surface we are going to use two options

1.with reference surface-if the c surface is perpendicular to tooling axis (90 deg)

2.with draft direction-if the c surface is parallel to the tooling axis.

At fillet areas we are going to use multi section surface so that ther be will be no issues.all the sweep part sare joined at the end as one surface.ensure proper length while creating the c surface so that it must overlap with the b surface.

Once it is done we have to join the sweeps pf class C surface with A surface and then trimm with B surface and close the body by using close surface.

B side features:

We are creating a dog house by extracting the surface and then make a sketch on it with required dimensions.

Then pad the sketch in both directions,uing the tooling axis as the diretcion.The using shell command give a thickness of 2.5 mm inthe face side.Then give draft angle of 1.5deg on 3 outer sides os the dog house.now we need to give fillets to the outer side.

For creating the C and B as per instructions we have to take the extract which we used for creating the tooling axis and offfseted it fro 3-6 mm and i have offseted it for 4mm and then trim with the dog house which is created upto now.

After trimming goto part workbench and split it.

The inner portion of the dog house also drafted with 0.5deg and then give fillet to the inner portion and check for draft analysis.For checking the draft anlsysi of inner portion we need a side core tooling axis.To crate a side core tooling axis extrat the surface of the dog house and make a point and then create a line using point direction method thisw will be our side core toolig axis.

If one of the dog house is created we can translate it using point to point method.so that it may be simple to have 2 doghuses.

The outer portion of the dog house is to be checked with the main tooling axis withd raft angle of 1.45 deg and the inner ortion is to checked with the side core tooling axis with draft angle of.0.45 deg.Draft anlysis of The dog houses w.r.t main tooling axis and side core tooling axis arre shown below.SImilarly the draft anlsysis of the part body have to take draft anlysis separetly which is 3 deg.

THe final part body along with B side features are shown below.