catia基础教程1-2

catia基础教程

Welcome to…

catia基础教程

YOUR FIRST PART – START TO FINISH

catia基础教程

Another way is to choose START, MECHANICAL DESIGN, and then PART DESIGN.

catia基础教程

There are a few different ways to begin a Catia session. From the start-up screen, choose FILE, NEW and then PART.

catia基础教程

THREE DIMENSIONAL PART GENERATION IS VERY EASY AND FOLLOWS A LOGICAL PROGRESSION WHEN YOU KNOW HOW TO USE A FEW ICONS…

going from THIS…

to THIS…

Catia is “WINDOWS” based and ICON driven…Something most of us are already used to.

to THIS…

Is as easy as 1…2…3!5

catia基础教程

This is the first screen you will encounter on the way to making your part. There are a few primary choices you will make here that determine the outcome of your part…

Part tree

Then, pick SKETCHER from the toolbar on the right. Firstly, choose which plane that you wish to sketch in. The PART TREE always tells you where you are. Notice at the top it says PART1 and at the bottom it is waiting for you to do something with PartBody.6

To keep it simple, pick the “xy plane” when beginning a part. This will help you to draw in a familiar plane.

catia基础教程

Now you are in SKETCHER. From here you pick an icon from the PROFILE toolbar and Click-and-Drag that shape in the sketcher environment.

Notice the Part Tree reflects the fact that you are working on Sketch1.

At this point you are just roughing in the shape. The exact dimensions will be added next if needed.

This square was drawn using the square icon in the sketcher environment.

This is the PROFILE toolbar. These shapes are easy to use and the icons are self explanatory.

catia基础教程

To CONSTRAIN, or dimension a part, first click on the line to be done as shown here…picked

This is the CONSTRAINTS toolbar…

Defined in dialog box… Normal constraint… Auto Constraint… Animate constraint…

Constraints are used throughout Catia and can be demanding. A later chapter will be devoted just to them.

Exit Sketcher…

Click the line and click on Normal Constraint for the dimension to appear…double click to change the dimension that appears…

Once you have all of the required parts dimensioned, you are ready to go into 3D mode… Click EXIT for Catia to leave the sketcher mode and enter 3D modeller…

catia基础教程

Once you enter the 3D environment, the part profile you were working on takes on an isometric orientation as seen here.

This is the SKETCHER toolbar from which you can choose a process of building your 3D model…here we have chosen PAD

Pad icon

Notice that not all of the icons shown on the shortened SKETCHER toolbar are active. This is because some other variable must be satisfied for Catia to allow it’s use. We will cover all of the icons and their uses later.

Once PAD is chosen, the PAD DEFINITION pop-up will appear. From here you define the TYPE and LENGTH of the pad. You can also choose to mirror the pad or reverse it’s direction from here.9 9

catia基础教程

The pad definition box will cause the limits that have been selected to be applied in a wire frame representa

tion first. Now if you click on APPLY and then OK, your wire frame will finally become a solid 3D model.

Notice that on your PARTS TREE, pad1 has been added BEFORE sketch1 that was already there. This is all part of Catia’s hierarchy system.

Congratulations! Your FIRST 3D part!10

catia基础教程

BASIC DRESS-UP FEATURES

catia基础教程

LESSON II : DRESS UP FEATURES

catia基础教程

Although technically not a Dress-Up Feature, POCKET is a tool that is used often. Unlike HOLE, the feature to PUNCH must be defined in SKETCHER mode since it is user defined, not just a hole.

pocket

catia基础教程

The first thing to do is pick the face that you want to pocket the void through, then pick Sketcher…

Line is picked

catia基础教程

In Sketcher, pick the proper shape icon from the Primary toolbar, and sketch the shape ON THE 3D PART represented in sketcher. Once this is done, EXIT sketcher to return to 3D mode…

Notice that the shape that will eventually become a hole in your part is represented in the part tree as Sketch2

Sketched circle

catia基础教程

This is how your part will look once you have returned to 3D. The sketch you made will appear flat on the face you chose. If it is not orange, choose it to make it active and ready for pocketing…sketch

Notice that in our 3D part the sketch we made was not orange immediately when we returned to 3D mode. NO PROBLEM….we just need to either pick it manually from the object we are creating, or directly from the parts tree.

Now click on POCKET from the Sketcher Based Features toolbar… pocket16

catia基础教程

With POCKET picked, the POCKET DEFINITION input box will appear. Input the desired information and Catia will show you a dashed line sketch of your pocket. If all the information is correct, push APPLY and hole will appear in 3D, then push OK to make it permanent.

Notice POCKET1 is active on the action tree. 17

catia基础教程

From TYPE, you can enter a dimension or constrain the depth of the punch by choosing “up to next”,”up to last”,”up to plane”, etc…using the arrow.

Depth is where you enter the dimension for the depth of your pocket.

Click on Mirrored extent to “mirror” or send your pocket in both directions.

Since Catia automatically sends your pocket in the most logical direction, if you want it to go the other way click on Reverse Direction.

catia基础教程

Here is your part with your pocket in it.Now lets begin to DRESS IT UP…

Dress Up Features toolbar

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