This chapter will describe the Top-Down Design methodology and available tools in Creo Parametric to accomplish this. It also compares the Top-Down design with Bottom-Up design technique.
Typical workflow of Top-Down Design will be explained in theory and also with the help of practical examples.
In this exercise we will learn how to create a simple assembly of parts that are driven by skeleton model.
The topics covered are as follows.
We will see how to achieve the following goals for the shown assembly of components.
In this exercise we will create a simple housing consisting of two parts.
The topics covered are as follows.
We will see how to achieve the following goals for the shown assembly of components using TDD.
In this section we will go through the basic steps of developing plastic products using Top-down design methodology.
The focus of the exercises covered in this section is the good understanding of the top-down design methodology. We will develop the products with the Creo surfacing tools learned in previous section. Here we will emphasize the top-down design concept and not the tools that Creo offers. In this way the reader will develop a strong interest in this design approach and will follow the remaining chapters vigorously.
In this exercise we will create a plastic product consisting of three parts
The topics covered are as follows.
We will see how to achieve the following goals for the shown assembly of components using TDD.
In this exercise we will create a plastic housing for a remote-control consisting of four parts
The topics covered are as follows.
We will see how to achieve the following goals for the shown assembly of components using TDD.
In this exercise we will create a plastic housing for a mobile phone consisting of three parts
The topics covered are as follows.
We will see how to achieve the following goals for the shown assembly of components using TDD.
When a feature in a model is referencing some geometry or information in any other model then such reference is called “External Reference”.
Generally, external references should be created only between a skeleton and a given model. External references between any other models are difficult to manage and should be avoided.
In this chapter we will see how to investigate the external references in a design project. We will look at the following tools that are used for external references investigation.
The topics covered are as follows.
The topics covered are as follows.
External References (ER) are essential for a design project to ensure that components interface and fit together according to design intent. They make sure that models update automatically upon regeneration.
Generally, external references should be created only between a skeleton and a given model. External references between any other models are difficult to manage and should be avoided. If not managed properly external references may become bottleneck.
The topics covered are as follows.
The External Copy Geometry (ECG) functionality copies geometry from model to model without copying the geometry in the context of the assembly. Dependency on the assembly and all models along the path between the two components is avoided.
In this chapter we will see the differences between Internal Copy Geometry Feature and External Copy Geometry. We will also learn different methods of creating ECG feature.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
Multi-Level assemblies can be defined as the assemblies consisting of at least one or more sub-assemblies within main assembly.
In the previous chapters, we have seen how to implement top-down design for single-level assemblies. But now we will see the different approaches for implementing top-down design to multi-level assemblies.
We will explore following two approaches for the multi-level assemblies
The topics covered are as follows.
The topics covered are as follows.
When starting a new design project, you should determine if you need motion simulation of design assembly. If you do need motion simulation of the design assemblies then you should plan right from the beginning and incorporate motion at the top level of product definition. This makes sure that finished product meets all the design criteria.
In this chapter we will learn how to incorporate motion at the top level of a product definition by following techniques
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
Skeleton models can maintain their own family tables. This means that assemblies can maintain different skeleton instances across a family table.
This is a great way to create the multiple configuration of an assembly driven by a skeleton.
The topics covered are as follows.
A notebook can be described as an engineering notebook where we can define parameters and relations related to a project. It maintains design intent in a central location.
Part and assembly models can both access these parameters and information in a notebook.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
There may be situations when we may want to create a CAD model that is based on or has some relation to an existing model. For example we may want to create a new part for flat state of a sheet metal part or create a mirror copy of an existing part. For such derivative models Creo provides a number of tools. In this chapter we will discuss the following tools available
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
The topics covered are as follows.
In this chapter we will discuss in a nutshell what top-down tools and techniques should be used in what scenarios.