Articles

When drilling, perhaps no variable is as important as the workpiece material. It dictates drill geometry and substrate, tool coating, coolant application, and speeds and feeds. While known for its relative softness and ductility, misconceptions abound among those who regularly drill aluminum.

Italy-based Samputensili S.p.A. unveiled a machine that eliminates the need for cutting oils when manufacturing gears, thereby reducing grinding costs. During grinding, oil-based lubricants cool the workpiece, as well as reduce friction and help evacuate chips. On the downside, however, oil use accounts for a significant amount of a grinding operation's total cost. Expensive equipment is required to supply, chill, catch and wash away oil in grinding processes. In addition, Samputensili estimates that oil-treatment equipment accounts for 75 percent of the energy consumed by a grinding machine.

Researchers at North Carolina State University reported the discovery of a distinct form of solid carbon they estimate is about 10 percent harder than diamond and could play an important role in machining. They also claim to have developed a relatively inexpensive technique for producing the substance, called Q-carbon, at room temperature and ambient atmospheric pressure.

We at Cutting Tool Engineering celebrated the New Year by unveiling a major overhaul to the design and functionality of our website, ctemag.com. Sporting a bright new design with larger text and images, ctemag.com is not only easier on the eyes, it's also easier on the fingers thanks to new navigation and search functionality. In short, finding the information visitors want will take fewer clicks than ever.

Cutting external threads is one of the more difficult machining operations. Achieving the proper thread form can be challenging, and tool chipping and premature tool wear are often problematic because of insufficient surface speeds and high cutting pressures.

Everyone crashes, I was once told. It's likely true. However, not all crashes are created equal. There are fender benders that just break small tools, and then there are head-on collisions that ruin much more—including your day. CNC machine crashes are relatively easy to avoid. They often occur during setup and debugging. If you can recognize high-risk situations, you'll be in a better position to avoid them.

Additive and subtractive manufacturing may be conceptual opposites, but a new partnership aims to show that the two can make a good team. Two of the partners are New York organizations: the Rochester Institute of Technology (RIT) and Elmira-based Hardinge Inc. RIT researchers are incorporating additive-manufacturing capabilities into Hardinge's Bridgeport GX 250 5-axis vertical machining center. The goal is to create a hybrid manufacturing system capable of producing more accurate parts at a lower cost than conventional manufacturing methods.

Ask the Grinding Doc: When I ran out of single-point dressing diamonds and got desperate, I mounted a PCD insert to dress an Al2O3 wheel. Is there any danger in doing that?

With 2015 being a year of changes and volatility in our market, the importance of strong, supportive business relationships was made even clearer. Longtime business associates became friends, and new business relationships formed with former employees who stayed in touch, neighbors, contacts made through my local chamber of commerce and even my brother's gym-workout partners. These are people who provided helpful insights and became ambassadors of our company, because they got to know us and saw potential.

CHALLENGE: Upgrade QC to reduce the amount of time required for dimension measurements. SOLUTION: Utilize an image-dimension-measuring system that enables hundreds of features to be measured in seconds. END USER: Autocam Corp. Inc., (800) 747-6978, www.autocam.com. SOLUTION PROVIDER: Keyence Corp. of America, (888) 539-3623, www.keyence.com.

CHALLENGE: Reduce setup and cycle times while meeting customers' demands for high-quality parts. SOLUTION: Two horizontal machining centers. END USER: Reinhold Industries Ltd., (780) 434-8552, www.rilflo.com. SOLUTION PROVIDER: Methods Machine Tools Inc., (877) MMT-4CNC, www.methodsmachine.com.

PCD oxidizes when cutting materials such as iron, cobalt, nickel, chromium and vanadium because of the high temperatures generated while cutting. Although not as hard, PCBN possesses superior chemical inertness compared to PCD.