Authors - David Bell
Articles written by David Bell
 | David Bell
President
Witt Gas Controls LP
He also is a member of the Practical Welding Today® Editorial Review Committee.
380 Winkler Drive
Suite 200 Alpharetta, GA 30004 phone: 770-664-4447 |
Results: 13
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Avoiding mix-ups with shielding gas mixesToday's job shops must be prepared to deal with a variety of materials for fabrication and welding. As each material may require a different mixed shielding gas for gas metal arc welding (GMAW), familiarize yourself with these gases and the most efficient supply methods for various applications.
Publish date: July 8, 2011 |
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Blended laser-assist gases: Recipe for successful materials processingNow processing a greater variety of materials with their lasers, fabricators are exploring new assist gas blends of up to four gases. What's the best way to blend and deliver these gases? For some, on-site blending systems can help optimize cost savings and improve quality.
Publish date: February 23, 2010 |
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The X's and O's of oxyfuelIf properly used and well-maintained, this equipment can cut, heat, and weld metals safely. But damaged, worn, or improperly handled equipment can lead to safety hazards such as fire and explosions that can cause serious injury or death. To know how to handle and care for the equipment and...
Publish date: January 15, 2010 |
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Optimizing CO2 laser use: Part IIAs explained in Part I of this two-part series, many factors can affect laser processing efficiency. This article explains basic laser beam delivery requirements; discusses laser gases and supply methods; and lists common problems caused by using incorrect pressure, flow, and laser speed.
Publish date: March 7, 2006 |
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Optimizing CO2 laser use: Part IMany factors can affect laser processing efficiency. This article, Part I of a two-part series, stresses laser system maintenance and discusses factors that can affect beam quality and efficiency—namely, impurities introduced by laser gases and gas supply systems and how to prevent them. It...
Publish date: January 10, 2006 |
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Site-based telemetry systems streamline gas supply
Publish date: October 12, 2004 |
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Laser-gas delivery systems for all applications, including 24/7 operationWhen laser gases are used in significant volumes or in an around-the-clock operation, a centralized gas delivery system is a practical necessity. A well-conceived delivery system reduces operating costs, increases productivity, and enhances safety.
Publish date: July 13, 2004 |
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Efficient shielding gas supply methodsThe introduction of gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW) in the 1940s changed the way metals were joined. The automation of these processes meant the gas supply system also had to be automated to achieve optimal productivity.
Publish date: February 26, 2004 |
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Choosing the right oxyfuel gas and supply systemMixing oxygen with fuel gases for brazing, cutting, heating, and welding metal has been around since the early 1900s. Oxyfuel processes have remained in use over the years despite the introduction of other metal fabrication processes, such as arc welding, plasma cutting, and laser materials...
Publish date: November 6, 2003 |
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Efficient use of compressed gases can increase productivityThe metal fabrication industry has used compressed gases for more than one hundred years. Oxy-fuel cutting and welding have existed since the beginning of the 20th century. The more automatic welding processes, such as gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW), began as...
Publish date: August 28, 2003 |
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Selecting the correct shielding gas and gas delivery systemRequirements for selecting shielding gas, filler metal, and welding processes are well- documented to help welders ensure high quality and consistency in their welding applications.
Publish date: January 10, 2002 |
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Choosing the right shielding gas and supply system for GMAWSelecting the right shielding gasses for your welding operation can mean the difference between mediocre production rates and peak efficiency.
Publish date: July 26, 2001 |
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Making solid delivery and storage choices for assist gases in CO2 laser cuttingHow you store and deliver assist gases to your laser cutting system is of critical importance to the effectiveness of your whole fabricating operation.
Publish date: May 15, 2001 |
