TiCon ProKon > Analysis Criteria ProKon A > Assembly Interference : Positioning

Change in Positioning/ Fastening Direction

Change in positioning axis or direction refers to the components, that require a change of the axis or direction (leaving the defined positioning axis) in order to reach its final position.

A change in positioning direction becomes necessary, if a component or sub-assembly has to be positioned in more than one direction along a defined positioning axis.

A change in fastening direction exists if a component or sub-assembly has to be fastened in more than one fastening axis/direction at the destination.

Explanation

The aim should be to position and fasten all components or sub-assemblies in only one direction. This requires defining a coordinate system in order to illustrate the defined positioning axis and positioning or fastening directions.


Defining a coordinate system	Change in positioning direction

Example:

Changing of positioning and fastening direction


Defining a coordinate system	The z-axis is the main assembly direction from top to bottom

Change in positioning direction (= change of coordinate axis) and in fastening direction (change in direction on the same coordinate axis)

	Change in axis	Change in direction
z-axis
4 bolts (assembly position)	0	0
from z-axis to y-axis
2 bolts (left side)	1	0
Change in direction on y-axis
2 bolts (right side)	0	1
from y-axis to x-axis
1 bolt	1	0

Restricted space

The restricted space requires additional motions and/or results in delays for the positioning.

Example:

positionieren_02

Aligning basic or positioning part

The part to be positioned or the basic part has to be turned around the positioning axis. Then the joining cross-sections are congruent.

Example:

positionieren_03a

positionieren_03b

Measure and/or check per criterion

Measure and/or check per criterion describes measurements or inspections of quality characteristics resulting from the design.

Explanation

The measurement or inspection is done by using cameras, scanners, sensors, actuators, etc.

Examples:

•Tolerances

•correct position

•correct part

Rule A-M1:

If before, during or after positioning, design-caused measurements or inspections are required, they have to be evaluated with the relevant frequency.

Readjustment

Readjustment refers to design-caused processes that must be performed prior to completing subsequent activities.

Explanation

Readjustment can be necessary as an independent activity for aligning or adjusting processes.

Rule A-J1:

If after positioning, design-caused adjustments are required, they have to be evaluated with the relevant frequency.

Rule A-J2:

Required measurements or inspections are not considered in the value and have to be analyzed separately.

Flexible part

Flexible part describes a component to be positioned, that is not dimensionally stable and requires appropriate support when being positioned.

Additional securing while positioning

Additional securing while positioning describes a basic part and/or component, that has to be secured additionally during positioning.

Explanation

Additional securing while positioning is required, if huge forces occur or if the component hasn’t been finally fixed yet.

Without positioning aids

Without positioning aids refers to an assembly process in which neither the component or sub-assembly, nor the positioning location, is equipped with positioning aids, such as bevels, pivots, stops etc.

Explanation

Missing positioning aids inevitably result in assembly interferences.

Examples:


without positioning aid	with positioning aid