Processes

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Processes

Processes

Processes are all activities that are performed for the purpose of positioning a component.

Explanation

To be able to classify processes specifically with respect to type and duration, a classification system involving 3 classes (P1, P2, P3) was introduced. In various production and assembly situations, quite different processes may occur. For this reason, every user has to assign one of the three classes according to the specific field of application.

The table below shows process assignments that are typically found in the field of manual assembly processes in industry.

Component

Activity /

Tool

Process

P1

P2

P3

Engage manually

e.g. engage a clip or open / close lids, flaps, doors etc.

 

×

 

 

Fasten screw

Machine screw

with screwdriver

 

×

 

with hand tool

 

 

×

Tapping screw

(or bolts and nuts that are handled like a tapping screw, or tightening a turned-on nut)

with power screwdriver

×

 

 

Engage thread

with screwdriver

 

×

 

with hand tool

 

×

 

manually

×

 

 

Tighten screw to torque

(remember the change of tool)

 

×

 

 

Place blind rivet

(rivet handling has to be analyzed separately in the ProKon analysis)

manual pliers

 

×

 

gun, single feed

(manually)

×

 

 

gun, magazine

×

 

 

Spin rivets

 

 

×

 

Embossing / clamping / edging / flanging and / or punching process

 

×

 

 

Projection welding / soldering process

 

 

×

 

Apply agent

(oil, grease, glue, color, primer etc.)

point / line         per 10 cm

×

 

 

area        ≤ 100 cm²

 

×

 

area        > 100 cm²

 

 

×

Label

(tag, insulating mat etc.)

≤ 100 cm²

 

×

 

> 100 cm²

 

 

×

Use of tool

(hammer, scissors, pliers, brush etc.)

1 tool

×

 

 

Move actuator

(lever, switch, crank etc.)

 

×

 

 

Handling tool

(shift large components with handling tool)

 

 

 

×

Great positioning depth (> 25 mm)

 

×

 

 

The table below shows the assessment of frequently occurring processes involving fastening and clamping activities, as it is done with the Units using the ProKon Analysis sheet:

Operation

PU

Process

P1, P2 or P3

Fastening jobs

Clamping jobs

with screwdriver

with hand tool

(ring or open-end wrench etc.)

self-tapping screw

machine bolt or nut

engage clamp by hand

engage clamp with tool

with positioning aid

without positioning aid

Get and place

40

 

40

40

40

40

40

40

Hold in place

20

 

20

20

20

20

20

20

Without positioning aid

15

 

 

 

15

15

 

 

Engage metric thread by hand

50

1

 

 

50

50

 

 

Engage / drive in /

turn on (tapping screw)

50

1

50

 

 

 

50

50

Fasten with screwdriver

150

2

 

150

150

 

 

 

Fasten with hand tool (ring or open-end wrench, screwdriver etc.)

300

3

 

 

 

300

 

 

Number of tools

40

 

40

40

40

40

 

40

 

150

250

315

465

110

150