GEOMETRIC MODELING

Basic Procedure for creating a 3D-model in cero 2.0

Modeling Procedure:

Open creo 2.0software

As you open the cero 2.0 a definition box will appear which represents the following modules.

1. Sketcher2. Part3. Sheet metal4. Assembly5. Drawing(drafting)

Now select the part module and deselect the default templates and select the required measurements in mmns or inlbs mostly mmns is preferred.

Now select the part module and select the measurements in which you want. Thus part module is opened with planes representing at the centre. Select the required plane and go to sketcher module so as to draw the sketch

Generally there are two types of profile we create in sketcher

1. Open 2. Closed

1. Open profiles:-these are generally preferred in surfaces

2. Closed profile:-there are preferred in part module

In this model we are going to create camshaft. So let us see how to create a camshaft model In our cero 2.0.

Now first of all open the cero 2.0 and select the pat module and in part module select the module .we can only create solids and surfaces in part module so we select the part module for creating our cam shaft. For every solid body we have you draw a sketch which acts as a base for the solid so first we will go into sketcher so as to create our base through our part module. As we enter part module there are various profiles available for us that are defined in our top tool chest.

So the drawn profile looks like this as shown in fig 1.0 given below .so this profile is our base and by using this as base we will create the solid and the first operation will be performed in part .

Fig 1.0representation of sketch

Next to exit the sketcher module go to the done option placed in the top tool chest known as done its purpose is to complete the sketcher so as to return the part module the part module is very important module for creating solids and surfaces in three dimensions.

Now let us focus on our part module

The sketch drawn part looks like a frame means it is a 2d representation .now to create a solid model of the drawn sketch go to part and in base feature select the extrude option and after the option is selected just give the depth value here the value is given as 12.

Fig 1.1 preview of extrusion fig 1.2 extrusions applied to sketch

Now our next procedure is create metal pace which joins the extruded part drawn above .thus to complete that process we have to select the face of the extruded part .the extruded parts are the two cylinders.

Now select the face of the cylinder and draw the sketch shown below.

Fig 1.3 representing sketch

Now to create the solid feature we just have to apply the extrude .the extrude feature is applied on the sketch shown above.

Fig 1.4extrusion applied on cylinders

In above fig first we have to select the surface of the two cylinders then we have to draw the sketch on the surface by selecting the sketch option placed in datum options .draw the required sketch and create the applied solid by using the extrusion.

Our next step is to apply mirror to the selected part .mirror is an edit feature which is applied to a solid as shown below. The mirror process requires a plane in the drawn fig ,what we have selected is the front plane as a reference to mirror the selected part.

Now let us see how it looks after completing mirror process .

Fig 1.5 plane selection for mirror fig 1.6 after mirror process

Now our final step is to apply the hole on surface of solid .the hole created will be through hole .now let us see how to apply the hole process

In order to create a hole we have to create a sketch. The sketch drawn looks like a frame, means it is a 2d representation. Now to create a solid model of the drawn sketch go to part and in base feature select the extrude option and after the option is selected just give the depth value.

b

Fig 1.7 sketch drawn on surface of a solid

The sketch drawn is circular the circular object is of some specific dimension that is shown in figure.

At last the final process that is extrusion process .the extrusion is the same process applied above which requires a sketch as we know. Now our next step is to covert the sketch in solid, so to create a solid what we have to apply is the process extrusion the extrusion is a base feature .what we have to do is just select the sketch created in the sketcher the sketch created will get converted into the solid part.

Let us see our final extrusion done to remove material.

Fig 1.8 extrusion applied on surface

Now let us see our final product and how does it looks.

Fig 1.9 final solid