Production Machining

AUG 2018

Production Machining - Your access to the precision machining industrial buyer.

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BMT-style turrets, whether they are rotating or static, and for toolholders with axial, radial and even angular orienta- tion. Consequently, quick-change can be easier to imple- ment, reducing both tooling costs and concerns about toolholder rigidity. Building Bridges "Available machining time is one of the key contributors to any manufacturing company's productivity," Mr. Schuffenhauer notes. "Reducing setup is a big part of improving this metric—something that quick-change tooling systems excel at. But there's also the downtime that comes during tool changes, when the operator spends 10 minutes looking for the screw that fell into the chip pan, for example, or the time lost by having to touch off a drill in the middle of a job. KM eliminates this non-productive time, and turret adapted-clamping units are the bridge between the system's quick-change capabilities and the machine tool." Offset and inline clamping unit models are available, as are ones for right- or left-hand place- ment. e list of KM adapters includes hydraulic chucks, ER collet holders, shell mill adapters and ID and OD turning cutting units. e clamping unit interfaces a range in size from 32 to 63 mm (KM32 to KM63). e turret-adapted clamping units are suitable for applica- tions on a lathe, mill-turn machine or multitasking center producing parts from tiny medical screws to bearing hubs large enough for a tractor trailer. Doing the Math Mr. Schuffenhauer adds, "KM uses a pair of hardened steel balls that sit within a tapered tool shank. As clamping force is applied, the tail end of the taper expands while the toolholder is pulled back against the locating face. Together, with a small amount of interference at the gage line, this three-point contact provides precise radial and axial positioning and repeatability, as well as high clamping forces." Jay Verellen, Kennametal director of global product management, tooling systems, points to the ROI calculator on as a way to quantify improvements in machine utilization and alleviate any concerns about cost. He notes that a potential positive return on investment :: Dual-station and offset clamping units provide a lot of flexibility when tooling up today's multi- axis, multi-spindle and Y-axis capable CNC lathes. :: The list of KM adapters includes hydraulic chucks, ER collet holders, shell mill adapters, and ID and OD turning cutting units. Here's another article on this topic: e Next Step in Setup Reduction Kennametal's KM quick-change modular tooling system was designed to address concerns about the weak- est point of spindles and machine structures being the spindle connection itself. LINK :: (ROI) in as little as three to six months is not unusual, and that the company's customer application support team is ready to help customers ensure they are getting the value they seek "It's not a terribly complex calculation," he says. "Enter a few inputs such as hourly rate and number of setups per shift, and it'll make sense pretty quickly." But shops should also consider the less tangible effects of KM. "Setups and in-process tool changes are simple, so having a less skilled operator isn't a scary proposition," Mr. Verellen says. "ey add flexibility as well, not only in the variety of tools and adapters that are available, but in the ability to help keep the customer happy. If you can set up a machine in five minutes, it becomes much easier to meet their changing demands without losing your shirt." Kennametal Inc. | 800-446-7738 | TECH BRIEF :: 29

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