Zone: Machining Centers & Milling Machines

OVERVIEW: The term “machining center” describes almost any CNC milling and drilling machine that includes an automatic toolchanger and a table that clamps the workpiece in place. On a machining center (as contrasted with a turning machine), the tool rotates, but the work does not. The most basic variety of this type of machine is also the most basic CNC machine tool—a vertical machining center. While vertical machining centers can be high-end machines because of their precision and/or their size, a small and simple vertical machining center is a relatively low-cost CNC machine tool that often represents a new machine shop’s first machine tool purchase. The orientation of the spindle is the most fundamental defining characteristic of a machining center. Vertical machining centers and horizontal machining centers have (obviously) vertically and horizontally oriented spindles. Vertical machines generally favor precision while horizontal machines generally favor production—but these generalizations are loose, and plenty of machines break out of them. Other choices in machining center orientation include the universal machining center, which can change between vertical and horizontal spindle arrangement. More common than this is the five-axis machining center, which adds rotary motion to the machine’s linear motion. The machine pivots the tool and/or the part not only to mill and drill at various angles, but also to mill swept surfaces. Machining centers linked by an automated pallet system can form an automated machining cell. Such a cell can machine a queue of different parts without operator attention by shuttling the parts in and out of the various machines as appropriate. Related machines in this category include the boring mill, which generally describes a large machine for heavy and/or precise milling and hole making. Another related machine is the manual milling machine. Such a machine may have some basic programmability, but it generally lacks an automatic toolchanger, meaning the tool change is a manual step.

Featured Zone Content

Beyond Secondaries: Vertical Machining Center Enhances OEM's Capability

Like many turning based shops, Clippard Instrument Laboratory first applied vertical machining centers to perform secondary operations on its screw machined parts. That view has changed for the better. ...MORE

Starrag Heckert HEC 800 X5 MT

Five-Axis Machine Offers High Dynamics for Complex Workpieces

The Heckert HEC 800 X5 MT five-axis machining center, available from Starrag, provides productivity, process reliability and precise cutting in a single clamping. ...MORE

Starrag Dorries Scharmann Technology Ecospeed

Machines Offer Parallel Kinematics for Aluminum Components

Dörries Scharmann Technology (DST), a subsidiary of Starrag Group, extends its Ecospeed range of parallel kinematics machines for productive machining of aluminum structural components in the aerospace industry. ...MORE

Starrag Heckert DBF 630

HMC Delivers Turning, Drilling, Milling with Single Clamping

The Heckert DBF 630 HMC, available from Starrag, enables turning, drilling and milling of non-rotational, asymmetrical parts in a single clamping with one toolholder. ...MORE

Hybrid Machine Combines Additive, Subtractive Processes

DMG MORI’s Lasertec 65 hybrid manufacturing machine combines additive and subtractive processes to produce a complete part from powder. ...MORE

How Much Can Unattended Production Add?

Using a horizontal machining center, this shop kept production going through two 10-hour shifts per day. That seemed like a lot, but a pallet system enabled the shop to go even further. ...MORE

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