Parametric Design & Representation

Beijing Institute of Technology via XuetangX

Overview

This course provides fundamental skills of parametric design and working drawing representation with modeling software. The main purpose of this course is not modeling skill and the mainly focus is new design concept and representation technique including rendering and formal working drawing made with modeling software.

The main contents of parametric and feature-based solid modeling are as follow:

Introduction to the concept of parametric design, basic features such as extrude, rotate, sweep and lofts. Situations when a working (sketch) plan is necessary and the methods of building a working plan. Constrains and sketching technique. Supplementary features such as rib, holes, thread, chamfer, fillets and so on.

As a new tool for design and representation, parametric modeling software provide powerful function of parameter transfer which makes match design in assembly easier and drawing views by orthographic projection unnecessary. The main contents of part design and representation as follow:

Assembly construction and part modeling under assembly environment; Formal engineering drawing of parts; modify the representation of standard parts such as gears, spring, gears which software can’t simplified as defined in GB or ISO standard; the function and application of representation such as section view, auxiliary view, half section view, broken out section view and so on; besides working drawing, rendering part and assembly is also an effective way of representation.

All these skills are given by a series elaborately designed examples which cover most often used representation technique and commands or functions of the of software. And in the lecturing, we do not focus on how to use the software but on how to learn using the software to meet our needs. Thus, makes this course is given with a specific software but not limited to it.

At last a project design is given to exercise the ability of mechanical design and representation through. It is a full application and examination of this course and it’s prerequisite-engineering drawing fundamental.

Syllabus

Lecture 1 Introduction：about this course

1.1 Relationship between traditional engineering drawing & modeling design
1.2 The way of teaching & learning
1.3 About design & creation
1.4A Bad design 1
1.4A2 Bad design 2
1.4B Real creation 1
1.4B2 Real creation 2
1.5 Good design should be simple, practical, economical & reliable

Lecture 2 Brief on parametric design

2.1 The way of modeling
2.2 The character of basic features
2.3 modeling software & Interface of Inventor
2.4 The concept of design intends (idea)

Lecture 3 Modeling example 1&2

3.1 Using constrain for shape design intends in sketch
3.2 Using dimension for size design intends in sketch
3.3 Design intends in feature level & feature edition
3.4 Feature of hole
3.5 Work plane & blind threaded hole
3.6 Fillets & rounds ／The appearance of the part／Project
3.7 Extrude symmetrically／Share the sketch
3.8 Feature array

Lecture 4 Modeling example 3&4 (more examples on extrusion)

4.1 Block decomposition
4.2 Design intends of the holes on base plate
4.3 Second extrusion and rounds
4.4 Create work plane using offset
4.5 Extrude to cut
4.6 Bisecting work plane／Brief on rib
4.7 Extrude the basic block
4.8 Definition and modeling of inclined cylinder(reflect the design intends precisely)

Lecture 5 Modeling example 5 (housing with complex shape)

5.1 Shape analysis
5.2 Feature array
5.3 Main extrusion features in the middle of the part
5.4 Inner shape in the middle of the part
5.5 Ifeature
5.6 Termination of extrusion
5.7 Temporarily create work plane for final work plane
5.8 Ribs,Fillets and rounds (sequence of adding rounds)
5.9 Elaboration on the rib

Lecture 6 Modeling example 6&7 (part with inclined arm and round part)

6.1 Shape analysis and basic extrusion
6.2 Full round fillet
6.3 Inclined work plane & second arm
6.4 Offset in sketch-ribs
6.5 Feature symmetrically cut off-Fillets & rounds
6.6 Feature of revolve
6.7 Revolve to cut
6.8 Counterbore hole-Design the key way

Lecture 7 Modeling example 8&9 (sweep)

7.1 Template selection／Sweep in 2D path
7.2 Sequence of features／Flange & tube or flange & solid
7.3 The construction of the 3D path
7.4 Sweep in 3D path／Using ifeature for flange

Lecture 8 Modeling example 10&11 (loft, shell & learning from samples)

8.1 The definition of the part／Basic features
8.2 Extrusion and holes
8.3 Feature of loft
8.4 Rib／Fillets on rib／Render the part
8.5 The definition of the part／Basic block extrusion
8.6 Feature of shell
8.7 Learning from samples／Part of engine
8.8 Learning from samples／Hair drier
8.9 Summary on modeling

Lecture 9 Representation example 1 (basic, full section & half section views)

9.1 Ways of representation／Review of view representation technique
9.2 Set up the drawing sheet
9.3 Customize your title block
9.4 Basic view
9.5 Full section view／Half section view
9.6 Centre lines
9.7 Annotate & title block filling
9.8 Deal with non-existing lines

Lecture 10 Representation example 2

10.1 Representation scheme about this part／Basic view
10.2 Partial view／Reflect your representation scheme precisely
10.3 Auxiliary view and alignment
10.4 Centre lines
10.5 None existing line
10.6 Retrieve annotates／Filling the title block

Lecture 11 Representation example 3

11.1 Representation scheme
11.2 Aligned section view
11.3 Incompleted views／The alignment of the views
11.4 Non-existing lines／Centre lines／Circular center line
11.5 Flat wise section of ribs／sketch only auxiliary lines
11.6 Size annotation／Title block filling

Lecture 12 Taper valve design 1 (parts design)

12.1 The relationship between design & modeling
12.2 The design idea of the taper valve
12.3 How to setup the functional size／Manage your design in project
12.4 Reflect the design concept of tapered hole
12.5 Bare hole & Pipe thread hole
12.6 Parameter transfer between parts
12.7 Finish other features

Lecture 13 Taper valve design 2 (assembly & animation)

13.1 Constrains of assembly／Assemble of shaft and housing
13.2 Washer from content center／Create part under assembly environment
13.3 Finish gland with projecting the location of the holes
13.4 Create the packing ／Place and assemble bolts from content center
13.5 Analyze interference between parts／Constrain driven & working animation

Lecture 14 Taper valve design 3 (assembly drawing & presentation)

14.1 What is in assembly drawing／Representation scheme of the taper valve
14.2 Basic view and full section view／Participation of parts in section view
14.3 Break out section view ／Thread feature representation／Edit the section lines
14.4 Annotate & balloon
14.5 Title block & part list
14.6 Functional animation
14.7 Assembly and disassembly animation

Lecture 15 Gear pump design 1 (parts design)

15.1 How gear pump works／Safety mechanism／Manufacturing technique structure
15.2 Fitting size & tolerance
15.3 Representation of gears & spring
15.4 How to setup parameters／Design gears in inventor／Undercut of gears
15.5 Finish the other features on gears
15.6 Modeling design of housing／Basic blocks with extrusion
15.7 Further extrusion without copy the profile of the feature
15.8 Spot face hole on the base／Extrusion for making pipe threaded holes
15.9 Inner features and holes
15.10 The definition of the cover nut (Learning from example)
15.11 Modeling design of the cover nut

Lecture 16 Gear pump design 2 (assembly & representation)

16.1 Subassembly of safety mechanism
16.2 Contact solver
16.3 Assembly of gears in housing
16.4 Assemble subassembly／Place the bolts and pins
16.5 Assemble the cover nut／Create the packing
16.6 Assembly drawing of gear pump／Deal with aligned section view
16.7 Break out section view of safety mechanism
16.8 Half section view on right view
16.9 Functional animation
16.10 Disassembly animation.
16.11 Management of the files／Pack and go of your project

Report

Final exam

Taught by

Huifu Luo

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