Assembly Technology Flashcards
What is a cobot?
A robot designed to assist humans, not replace them
What is the maximum workplace lift weight?
25kg
What are the 5 categories of handling that VDI Guideline 2860 cover?
Securing, moving, changing quantities, storing and quality control
What makes robots work?
By kinematic theory (calculated cartesian movements)
What three things can vibrations cause?
- Increased noise levels
- Premature wearing of machinery
- Additional stresses on parts being manufactured
What is considered when designing assembly stations?
Ergonomics, organisation, psychological factors and safety
At what noise level (in decibels) should you wear ear protection?
85+ decibels
What is the quality controlled level of lighting in a workplace?
5000 lux
What are the minimum and optimal spaces required between workbenches?
Minimum = 1m
Optimum = 1.5m
Why can high EMF levels from certain machines be dangerous?
Can affect the abilities of people with pacemakers and mechanical body parts
What are the 4 handling operations for securing?
Hold
Let go
Tighten
Loosen
What is the definition of securing?
The process of holding a tool or workpiece for a period of time
What are the 8 handling operations for moving?
Rotate
Swivel
Change orientation
Shift
Fix position
Order
Lead
Place
What is the definition of moving?
The changing of a workpiece’s position and orientation
What are the 6 handling operations for changing quantities?
Dividing
Merging
Batching
Separating and allocating
Branching
Assembling
What are the 3 handling operations for storing?
Ordered storage
Partially ordered storage
Disordered storage
What are the 2 handling operations for quality control?
Testing
Measuring
What are the 3 main groups of automated handling equipment?
Equipment for storage
Equipment for changing the quantity, position and orientation
Equipment for holding
What is static imbalance?
When the rotating centreline (axis about which the part is rotating) and the geometric centreline (centreline going through centre of rotating part (i.e. the cam)) are parallel to each other, and are therefore not balanced
What is dynamic imbalance?
When an asymmetric distribution of mass causes a misalignment of the rotating centreline and the geometric centreline
What are the two assembly methods? What is the difference between the two?
Assembly cell and assembly line
Assembly cell is all done on a single station, whereas an assembly line has each station do one task
