Use of geometry data

Question 1

What is a digital mock up (DMU) and for what is it used?

Answer 1

A special type of component based assembly model developed to be able to handle large assemblies (>1000
parts) from different CAD-systems
Can be used for e.g. packaging studies and assembly simulation, but not for e.g. calculation of mass

Question 2

Mention four different standards for geometry exchange and what type of geometry data they can handle.

Answer 2

IGES – mathematical
STL – triangulated
VRML – triangulated
JT – both
STEP – mathematical

Question 3

Mention two different tasks in the product realization process where off-line programming can be used

Answer 3

Programming of industrial robots
Programming of NC-machines
Programming of CMMs

Question 4

Mention two advantages of using off-line programming

Answer 4

Don’t need to stop the production when making new programs

Faster and more efficient programming

Avoid costly mistakes with real machines

Question 5

Mention four different types of geometrical models and what they are used for.

Answer 5

CAD-model
Defines the geometry of the product
Mechanical model
View of the product as a mechanical system, used by design to evaluate mechanical behaviour
Visual model
View of the product appearance, used by design, management, marketing
Ergonomic Model
View of the products ergonomic properties, used by design, manufacture, service

Question 6

Mention two different usages of geometry models within production.

Answer 6

Ergonomic simulation
Off-line programming of industrial robots, NC-machines, CMMs

Question 7

Give two examples of usage of ergonomic simulation with computer manikins

Answer 7

Evaluation of user interfaces
Evaluation of concept for manual assembly