Lathes Use Low-Frequency Vibration to Avoid Chip Problems
PMTS 2017: The popular Citizen Cincom L20 sliding-headstock lathes from Marubeni are now available with low-frequency vibration (LFV). LFV is said to avoid the problem of spiraling chips, chip entanglement and built-up edges.
The popular Citizen Cincom L20 sliding-headstock lathes from Marubeni are now available with low-frequency vibration (LFV). LFV is said to avoid the problem of spiraling chips, chip entanglement and built-up edges. Benefits include increased cutting tool life, reduced heat generation and reduced power consumption. LFV technology can handle a range of machining shapes and materials and is ideal for cutting difficult-to-cut materials, increasing throughput and improving part accuracy. In LFV cutting, “air cutting” time prevents the machining temperature from rising, prolonging tool life and providing relief from various problems caused by chips.
One of the most common methods of tapping in use today on CNC machines is 'rigid tapping' or 'synchronous feed tapping.' A rigid tapping cycle synchronizes the machine spindle rotation and feed to match a specific thread pitch. Since the feed into the hole is synchronized, in theory a solid holder without any tension-compression can be used.
The more common twist drill point geometries often are not the best for the job at hand. By choosing the best point for the material being drilled, it is possible to achieve better tool life, hole geometry, precision, and productivity.
Running rotary milling cutters at the proper speeds and feeds is critical to obtaining long tool life and superior results, and a good place to start is with the manufacturer's recommendations. These formulas and tips provide useful guidelines.