Blame it on the Metal
Thursday, November 19th, 2009“Is it the machinery or the operator?” That was always my mother’s question when a piece of equipment wouldn’t cooperate with my demands. Was it the computer’s fault that the printer kept jamming? Or perhaps… was it the fault of the operator?
The same applies to the world of welding. Is it really the metal’s fault when a weld doesn’t hold true? Can you blame the steel for warping? Was it the machinery‘s fault, or was it the operator?
‘Bad’ steel — the ultimate scapegoat
By Art HedrickAugust 1, 2009It seems like every time there is a problem making a good part, the steel is blamed. Often the root problem is the process used to cut and form the steel — the combination of the die, the press, and the lubricant.What the heck is “bad” steel? It seems like every time there is a problem making a good part, the steel is blamed. Cracking problems? It’s bad steel. Wrinkling problems? It’s bad steel. Springback problems? It’s bad steel. Cold and rainy outside? It’s bad steel. You get the idea.As a tool- and diemaker, I, too, used to blame the steel for many problems. However, as I learned more about the processes of stamping and metal forming, I quickly came to the conclusion that the steel is not always to blame.When I’m asked to consult for steel suppliers, the usual scenario is that they are being accused of selling bad steel to their customer, and they want me to go into the stamping facility and defend their honor. To be perfectly honest with you, most of the time nothing is wrong with the steel. Often the root problem is the process used to cut and form the steel — the combination of the die, the press, and the lubricant.I’m not suggesting that there is never a problem with the steel. Stampers have most certainly received steel that was out of spec. What I am suggesting is that you take a hard look at the data before you make a rash decision.‘Bad’ steel — the ultimate scapegoat
By Art Hedrick
August 1, 2009It seems like every time there is a problem making a good part, the steel is blamed. Often the root problem is the process used to cut and form the steel — the combination of the die, the press, and the lubricant.
What the heck is “bad” steel? It seems like every time there is a problem making a good part, the steel is blamed. Cracking problems? It’s bad steel. Wrinkling problems? It’s bad steel. Springback problems? It’s bad steel. Cold and rainy outside? It’s bad steel. You get the idea.
As a tool- and diemaker, I, too, used to blame the steel for many problems. However, as I learned more about the processes of stamping and metal forming, I quickly came to the conclusion that the steel is not always to blame.
When I’m asked to consult for steel suppliers, the usual scenario is that they are being accused of selling bad steel to their customer, and they want me to go into the stamping facility and defend their honor. To be perfectly honest with you, most of the time nothing is wrong with the steel. Often the root problem is the process used to cut and form the steel — the combination of the die, the press, and the lubricant.
For at least six decades, traditional gas tungsten arc welding (GTAW or TIG) has been considered the process of choice for attaining high-quality welds in any metal application. However, this process has certain drawbacks, such as the weld energy limitation influenced by the weld pool dynamics and typically slow manual wire feed rates. Manual GTAW requires highly skilled operators who possess the dexterity necessary to feed the wire. Manual GTAW techniques vary, and the weld-wire-to-arc and weld puddle placement are inconsistent.
Shielded metal arc welding (SMAW) is the most common form of arc welding. However, creating a good weld is not always easy, especially for a beginner. Unlike gas metal arc welding (GMAW), in which you basically point and shoot, SMAW requires a higher skill level and a mastery of certain techniques.

The basic technology for plasma cutting has been around for decades. Researchers and engineers remain focused on increasing cut speed, improving cut quality, and extending consumable life, while making systems smaller and more powerful.


