extruded cutout in cilinder

[toolmaker]

Hi,

Beginner just learning how to work with solidworks

Solidworks 2007


i would like to make a extruded cutout in the length of a cilinder, like a keyway, only my cutout has a more complex form,

The cut needs to be on the top of the cilinder, but when i select the top plane, i noticed that it looks as if this plane is in the center of my cilinder

But if i select this plane,and sketch my cutout, then exit sketch i can choose in a new cut-extrude window

so i think that in the from window i have to select surface/face/plane, and in the direction 1 window i need to selec offset from surface.

But if i do this i get the error select a face to complete the specification.

Please help me to create a cutout offset from surface.

Must i create a custom plane outside my cilinder?, if so please explane how.

thanks Toolmaker

 

[mjcole_ptc]

You don't need to use surface/face/plane in the From window you can keep this as Sketch plane.

You can choose Thru All or Upto Next in Direction 1 or Direction 2.

If you do use from surface/face/plane be sure to flip the direction of feature creation by clicking the arrow next to Upto surface. By default the direction using From Face points out from the surface selected.

Offset surface is normally used when you want the cut to stop midway thru the cylinder and it sounds like you want it to fully cut the cylinder along it's length.

Michael

 

[ridein]

It sounds like you are complicating a simple operation.
Just select your top face where you want your cut to start and use that for your sketch plane. Then sketch your profile, then just do a blind cut or through all a cut extrude feature.

 

[toolmaker]

Thanks for the reply,

But my cut needs to be offset from the surface going 4mm into the cilinder to the center.

The top plane in this part (witch i can select) is located in the center
( because of origin ?).

My cut is starting 10 mm from the end of the cilinder going 40 mm in the length of the cilinder,stops, and then go's 10 mm left and 10 mm right (cross the length of the cilinder) 90 degrees to the previous cut , like a T pushed in from the side/top

thanks

Toolmaker

 

[mjcole_ptc]

Sketch the T on a plane through the center of the cylinder which it sounds like you've done on the top plane. Since you mentioned keyway this example model shown was modeled with the circular face of the cylinder parrallel to the top plane but I've oriented the model to what I think you are explaining.

From your explanation I'm guessing that you want the base of the T cut to be cylindrical but offset 10mm into the feature.
To do this create an offset surface before the cut feature using the outside of the cylinder as a reference.
On my model I did this but used a plane to trim it so that it was only on the side I wanted the T cut to be placed -otherwise the cut would extend to the opposite side- hence the Surface Trim 1 reference.

This surface is shown in Green on the following picture.
Use this as your From -> Surface/Face/Plane reference, make sure the Arrow is pointing away from the cylinder and choose Thru All as your depth option in Direction 1.
T Cut example pic

Michael


Edited by: mjcole_ptc

 

[toolmaker]

Thanks for the reply,

I think my explanation needs a few pictures
This part was made in Solid edge v16 in witch i know how, but i switched to Solidworks recently , i am in the learning proces.

thanks,

Toolmaker

 

[toolmaker]

Oeps, I thought i was posting a link to tinypic.com to share my pictures, but they show directly, without the links, sorry.

As i told you i am just starting with SolidWorks so most things that are vary normal for most of the guy's on the forum, might not be for me !!!

thanks,

Toolmaker

 

[ttraser]

1. create an offset surface from the cylinder, inwards to be utilized as the depth of your keyway cut.


2. create an plane at a distance, which is tangent to the cylinder surface.


3. create a sketch on that surface for the cutout you wish to create.


4. create a cut, up to surface, and select the earlier created surface.


good luck.

 

[mjcole_ptc]

Too many features.

If you already have a sketch don't bother swapping planes just create a plane tangent to the cylinder and normal to the mid plane of the T.

Click the plane icon Select the cylindrical surface and a plane to be normal to.
Plane Tangent to Cylinder
In the extrusion use this as your from reference and enter a Blind Depth to get the flat bottom as you would in real life.
From Tangent Plane to Blind Depth

Thanks for the images it seems we were close to what you wanted but now you can get a more correct answer.

Toolmaker, the button you were using "Add Image" posts the full image from a weblink. The icon to the left adds a hyperlink for selected text and allows you to paste in the full link. The one to the right of the text color "A" icon allows you to directly load a picture from your computer but I've been getting a Visual Basic Error for this recently because the max file size allowed is 15K.

Michael


Edited by: mjcole_ptc

 

[toolmaker]

Ok thanks
for the help



Hope to give some assistants in the near future to some of the forum
members also.

Toolmaker

 

[michael3130]

toolmaker,


I know I'm late in this post but another way to do this is to have your top plane not in the centre of your cylinder but as the depth of your cut. So in your 1st sketch, the initial circle sketch will have a dimension from the outer edge to the top plane which is the depth of your keyway.


Then sketch your profile of cut on the top plane and cut through all to create your cut.


Using this method, the initial sketch will drive the cylinder diameter and the keyway cut depth.


Michael

 

[toolmaker]

Thanks Michael,



I already
solved the problem by dragging the plane from the center to half the diameter of
my cylinder(surface) and then make my cut to the depth I needed.

I just had
to find a way to place the plane on the surface

Toolmaker