Modern Machine Shop

OCT 2018

Modern Machine Shop is focused on all aspects of metalworking technology - Providing the new product technologies; process solutions; supplier listings; business management; networking; and event information that companies need to be competitive.

Issue link:

Contents of this Issue


Page 67 of 147

MMS OCTOBER 2018 66 DIE/MOLD Five-Axis Machine Gives the Tilt a Whirl The D200Z CNC five-axis VMC uses an angled rotary table designed to improve rigidity and clearance for high-speed machining. One of the most reliable ways machine tool builders maintain workpiece stability is to build a sturdy, heavy frame and a solid bed to reduce the miniscule movements during machining that can cause tool deflection or chatter. However, five-axis machines have a somewhat less-stable worktable design. This is because of the rotation they must provide to position part at di•erent angles. According to Makino, different five-axis con- figurations have different benefits and challenges to consider, being that tilting•the worktable along the A or B axes can compromise rigidity. For example, at certain positions, a swinging trunnion table can introduce leverage that•ampli- fies•micro-movements•in the workpiece•when•the cutting tool makes contact, possibly resulting in def lection and chatter. While this loss of rigidity can be frustrating,•the benefits of the complex contouring•and•single-setup machining are often more than enough to justify the investment.•How- ever, Makino recently developed the D200Z, which it says is designed to eliminate the need for a compromise. The company displayed the machine at Amerimold 2018, where it demon- strated how the CNC vertical machining center (VMC) achieves five-axis movement through a set of two integral rotating tables, one of which is tilted at a 44.5-degree angle. According to the company, the perma- nent•44.5-degree tilt is a critical aspect of this rotary-table design. The•tilted•plate rotates about the B axis, while the rotary table attached to it rotates along the C axis, together enabling•full five-axis machining and 3+2 machining.•While ELI PLASETT | ASSISTANT EDITOR The compact design of the D200Z reduces floor space and improves ergonomics. Users can customize it with automation options including robots and larger toolchangers.

Articles in this issue

Links on this page

Archives of this issue

view archives of Modern Machine Shop - OCT 2018