Are my Autocad drawings describing the model well enough?

[tlaaa]

Hi there

 

I'm drawing in Autocad some object for a my autocad class.

I'm supposed to draw it using the 3-D picture as a model

 

The model

This is what I have drawn.

 

I saw just wondering if the object I'm drawing is ** described well enough** with these drawings I have done?

[fuccaro]

You drew the views by hand, right?

In the top view I see a missing horizontal thick line, an edge of the hexagonal prism (right over the axis line).

The D10 hole is right on the middle of the rectangular face? Maybe a dimension should show that.

We use to dimension the distance between two parallel edges of the hexagons, to indicate the wrench size.

Maybe it is ok as in the drawing you posted, but according to our standards the section line should cut only one view.

I see the diam 35 for one side. Is the other cylinder the same diameter? I think you should dimmension it too.

Also we use to give a dimension only once. See the horizontal dims at the top of the drawing: If you put the dim 45 for the right cylinder's height and 20 for the plain face, the remaining 25 can be calculated from the other two dimension. So I would not put the dimension 25 on the drawing unless it is an important dimension. The same goes for the other cylindrical end and for the overall length.

Oh, and one more thing: welcome in the forum!

 

And: you can tell to your instructor that the given image is not complete. If the hidden lines are shown, it should show ALL the hidden lines. Including the ones for the bottom plain face of the left cylindrical part.

[ReMark]

Draw the object in 3D then use the Base View command to extract the 2D views. The command can be found on the Annotate tab in the 3D Modeling workspace.

 

Where are your extension lines?

 

Shouldn't the "Top" view be above the "Front" view?

 

Bump up the setting for Viewres so your circles don't look like polygons.

 

I think you're missing some dimensions. And you need to properly label the views.

Edited October 2, 2012 by ReMark

[Dadgad]

Draw the object in 3D then use the Base View command to extract the 2D views.

 

Where are your extension lines?

 

Shouldn't the "Top" view be above the "Front" view?

 

Bump up the setting for Viewres so your circles don't look like polygons.

 

I think you're missing some dimensions. And you need to properly label the views.

 

Before you use the VIEWBASE command, you can set the DRAFTING STANDARDS PROJECTION TYPE as shown in the image by right clicking on the LAYOUT tab.

[tlaaa]

Thanks for the answers.

 

Just one question.

 

I need to explain WHY my picture will be good enough for a machinist to build it. I think my drawing does that after I fixed my dimensioning but i cant find a reason why it does?

[ReMark]

A good drawing will have all the necessary views and dimensions required to make the object. It would also be clear, concise and accurate.

 

Does your drawing meet all these requirements?

[Dadgad]

Welcome to the forum, by the way.

Is it unambiguous and complete?

Next case!

[JD Mather]

I need to explain WHY my picture will be good enough for a machinist to build it.

 

What standard are you using for dimesioning (for example, I use ANSI (American National Standards Institute)), you dimension style looks more architectural than mechanical.

 

Can you give the 2D dimensioned drawing to a classmate and they can model the 3D solid without asking you any questions? (sometimes we are too close to our own work to do this test ourselves)

 

I didn't look closely at the other comments - but it is standard practice to dimension across the flats of a hexagon rather than across the points. This is the dimension size of the wrench or socket that someone will use to turn the part. This is the dimension that the stock size is purchased as.