Appendix A

PULSE WAVE SHAPING PRINCIPLES

A-1

A.1 APPENDIX OVERVIEW

This appendix provides a series of discussions on pulse wave shaping principles and the development of custom GMAW pulse waveforms. The contents of this appendix are arranged as follows:

Paragraph No./Title

Contents Description

A.2

GMAW Pulse Overview

How the pulse waveform transfers weld droplets to the

 

 

weld surface

A.3

Adaptive and Non-Adaptive

How WFS and primary wave shape parameters effect

 

Mode

welding

A.4

Pulse Wave Design Process

Flowchart and step by step descriptions of the pulse

 

 

wave design process

A.5

Primary Pulse Waveform

How peak current, peak time, frequency, and

 

Components

background current effect weld droplet transfer

A.6

Secondary Pulse Waveform

How ramp up rate, % ramp overshoot, tailout speed,

 

Components

tailout time, stepoff amperage, and background time

 

 

effect weld droplet transfer

A.7

Application Exercise

Sample development of a power wave welding program

 

 

using Wave Designer

WAVE DESIGNER

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Image 33
Lincoln Electric IM649 manual Pulse Wave Shaping Principles, Appendix Overview, Appendix a