Laser Welding Formulas

The process time calculation for Electron Beam Welding uses the following formulas:

Process Time = (Weld Time + Load Time + Unload Time) / Number of Weld Heads

Process time depends on the following:

• Weld Time (see formula)

• Load time: per-part load time. By default, this is looked up by part weight in the lookup table componentLoadTime:

Users can override the calculated load time for the entire batch (see Number of Parts in the Machine per Cycle) with the setup option Time to Load the Assembly.

• Unload time: per-part unload time. This is looked up by part weight in the lookup table componentLoadTime. Users can override the calculated load time for the entire batch (see Number of Parts in the Machine per Cycle) with the setup option Time to Unload the Assembly.

• Number of weld heads: specified by the machine property Number of Heads.

Per-GCD Weld Time

Weld time for a single Weld GCD is given by the formulas below.

Weld Time = (Weld Length * Number of Weld Segments / Weld Speed) +

Part Manipulation Time

Weld time depends on the following:

• Weld length (specified by the user or geometry extraction)

• Number of weld segments (specified by the user or geometry extraction)

• Weld speed (see formula)

• Part manipulation time: this is the product of the number of weld segments and the machine property Part Placement Time.

Weld Speed = ((Efficiency Factor * Machine Power) / Weld Depth))

Default weld speed depends on the following:

• Efficiency factor: specified by the cost model variable LWEfficiencyFactor (20 in starting point VPEs).

• Machine power: specified by the machine property Machine Power.

• Weld depth (specified by the user or geometry extraction)

The speed is bounded above by the machine property Max Speed.

Users can override the default speed with the setup option Weld Speed.