Making Tooling More Cost Effective
Something as simple as trading standard retention knobs for a longer version could help eliminate bulge in V-flange tooling and the problems associated with it.
Share
Takumi USA
Featured Content
View More
.png;maxWidth=45;format=webp)
DMG MORI - Cincinnati
Featured Content
View More
Autodesk, Inc.
Featured Content
View More
ECi Software Solutions, Inc.
Featured Content
View More
Hansen Engineering Co. used a standard retention knob in the toolholder on the left. Taper deformation prevents the toolholder from properly mating with the CNC machine’s spindle, however. In contrast, the photo on the right shows use of JM Performance Products’ high-torque retention knobs in the toolholder. A longer design enables the knob to reach deeper into the holder’s threaded bore, improving taper-contact quality.
When a standard retention knob is installed in a V-flange toolholder, pressure exerted by thread engagement, coupled with the elastic properties of the steel used to manufacture the toolholdrers, creates a bulge at the small end of the holder. Once expansion occurs, the holder will not pull all the way into the spindle, and the toolholder cannot make contact with upwards of 70 percent of the spindle surface. When this happens, vibration, chatter, poor tolerances, non-repeatability, poor finishes and shortened tool life are among some of the problems that shops can face.
Hansen Engineering Co. knows these problems all too well, as its everyday machining operations began to present increased issues. A simple solution that reportedly increased the aerospace engineering shop’s productivity by 15 percent and decreased downtime was a high-torque retention knob from JM Performance Products Inc. The high-torque knobs are longer and reach deeper into the holder’s threaded bore than standard knobs, which encourages thread engagement to occur in a region of the toolholder where there is a thicker cross section of material to resist deformation.
Related Content
-
Through-Coolant System Cuts Nickel-Alloy Cycle Times by 70%
Decker Machine Works recently adopted Rego-Fix’s reCool through-coolant system for ER collets, reducing the cycle times on a nickel alloy job by 70%.
-
Quick-Change Tool Heads Reduce Setup on Swiss-Type Turning Centers
This new quick-change tooling system enables shops to get more production from their Swiss turning centers through reduced tool setup time and matches the performance of a solid tool.
-
How to Mitigate Chatter to Boost Machining Rates
There are usually better solutions to chatter than just reducing the feed rate. Through vibration analysis, the chatter problem can be solved, enabling much higher metal removal rates, better quality and longer tool life.
