hurco rotary table made in china

The SRT series of 5-axis CNC mills offers multiple advantages, starting with the machine"s design configuration that utilizes a swivel head with either an A or C style rotary table. The generous size of the rotary table provides maximum versatility because you can use the extra table space for secondary operations or 3-axis work.Request PriceScroll to Machine Specifications

The Hurco VMX42SRTi 5-Axis CNC mill offers maximum flexibility. The SR series of 5-axis CNC mills offers multiple advantages, starting with the machine’s design configuration that utilizes a torque B axis swivel head and C axis style rotary table. The generous size of the rotary table provides maximum versatility because you can use the extra table space for secondary operations or 3-axis work. Exceptional cutting feed rates are achieved with patented high-speed motion technology – resulting in the fastest cut with the best surface finish.Request PriceScroll to Machine Specifications

When is a three-axis vertical mill, equipped with an aftermarket two-axis rotary table, preferable to a true five-axis machining center? Ask Fischer USA.

Michael Guzman, manufacturing engineer III, creates fixtures with locating pins that can be stored and reused for repeatable positioning of any given part. “The next time we want to run this part, because each fixture has a certain orientation to the Lehmann table, it will be a very quick changeover. Probably under 30 seconds,” he says. Photos: Brent Donaldson

At the Fischer USA headquarters in Racine, Wisconsin, a Mazak VCN 530C fitted with a Lehmann 5AX rotary table allows for 3+2 (or “positional”) machining, in which the rotary table positions the workpiece for three-axis operations. According to Ryan Krause, Fischer USA senior manufacturing engineer, and Michael Guzman, manufacturing engineer III, the 3+2 configuration provides the necessary machining flexibility at a considerably lower cost than a full five-axis machine (that is, one that moves all axes synchronously during the cut).

On Fischer’s shop floor, all of the machining work is spread across several CNC lathes and grinding machines, as well as a Mazak Integrex mill-turn. In 2021, the company added the 3+2 machine, which was assembled and tested with a 20,000-rpm Fischer spindle and Lehmann two-axis rotary table before shipping from Mazak’s North American headquarters in Florence, Kentucky.

The second (and predominant) consideration was cost. As useful as a five-axis machining center might be, the cost differential with the three-axis machine amounted to a six-figure sum, even with the addition of the rotary table. Overall, Krause and Guzman have found that the Lehmann table allows for a degree of flexibility in its approach to machining these parts that is more than sufficient.

The Fischer USA team considers the Mazak VMC and Lehmann table to be a step in between the shop’s former machining routines and a full five-axis solution — a happy medium that allows running turning operations first, then handing parts over to the Mazak VMC for multiple milling operations in one setup.

On the Mazak VMC, the setup often includes a Chick or Lang vise holding parts on the left side of the worktable and the Lehmann two-axis rotary table holding a part on the right. A clever workholding solution devised by the Fischer USA team allows for parts positioned on the Lehmann table to be flipped and machined radially and axially on both sides with the table’s ability to flip the part 180 degrees.

On the Mazak VMC, the Lehmann rotary table is positioned far to the right side of the worktable, while orienting the unit with the gear box in the back further maximizes table space. The Fischer team often sets up two parts at once: one on a vise, and one on the rotary table.

The ability to machine parts radially and axially in one setup is a prime advantage of the Lehmann table. For example, machining spindle shafts once required removing the part for a second setup, using the blind holes machined in the first op to position it. But now, custom-machined soft jaws clamp the OD of the spindle shaft in a Lang vise. With the rotary table, the part can now be radially machined on one side, flipped 180 degrees by the table, then axially machined on the other in a single setup.

Similarly, the rear covers of Fischer spindles were originally produced from castings, but that resulted in high tooling costs for a low-volume part. Fischer now machines the parts from raw slugs. After turning operations, the vertical mill and rotary table can handle all milling in a single setup.

This encoder wheel features hundreds of teeth that, through an electrical sensor placed inside a Fischer spindle, encode the rotational position of the spindle shaft as well as its speed. When machining these parts, the Lehmann table’s radial and axial accuracy, as well as its rigidity, are paramount to precisely milling these gear teeth on the Mazak VMC.

Inside the Mazak VMC, the Lehmann table is positioned on the far right-hand-side of the worktable, allowing for additional vises and machining operations to take place on the left.

The Lehmann table’s ripas unit consists of the HSK interface, the ripas adapter (the gripper unit that connects the HSK to the fixture or workholding) and the keyways that position the adapter rotationally in place. Guzman says these keys are also a differentiating feature in terms of maintaining tight positional tolerances that reduce the need for runout checks.

This level of precision also enables Guzman to create fixtures with locating pins that can be stored and reused for repeatable positioning of any given part. “The next time we want to run this part, because each fixture has a certain orientation to the Lehmann table, it will be a very quick changeover. Probably under 30 seconds,” Guzman says.

For Krause, the choice of a a 3+2 configuration with the Mazak VMC and Lehmann table comes back to cost and need. “We really wanted to go into this and customize a machine that fit our business need right from the beginning,” he says. “You could look at a lot of our work and say that it would really be nice to have a five-axis machine, but we need to have the flexibility of very large parts on the table while utilizing the Lehmann for things like axial work, radial work and angled holes. Ultimately, that meant building the most flexibility that we can for the future.”

The XR20 rotary axis calibrator works in conjunction with XL-80 and XM-60 laser systems providing highly accurate, repeatable rotary axis calibration for stages, jigs and machine tools.

A mounting ring adaptor plate enables the XR20 rotary axis calibrator to be fitted to rotary tables with unsuitable centre recesses. It can also be used to secure the XR20 rotary axis calibrator to the chuck (lathe) adaptor and custom mounts.

CARTO software suite is used for capturing data, analysis and rotary measurement using the XL-80 laser or XM-60 multi-axis calibrator. CARTO is made up of three applications:Capture to collect laser measurement data.

Off-axis rotary measurement mode in the CARTO software suite provides a single source for testing off-axis measurement using the XR20 rotary axis calibrator and XL-80 laser system. This streamlines the measurement of rotary positioning accuracy for 5-axis machine tools, where the XR20 rotary axis calibrator cannot always be mounted on the centre of rotation.

Off-axis rotary measurement application in the CARTO software suite allows the XR20 rotary axis calibrator to be used to measure the rotary positioning accuracy of an axis, even when the XR20 isn"t mounted on the centre of rotation (pivot point) of that axis. This extends the capability of XR20 to many five axis machine tools.

The mounting of the XR20 rotary axis calibrator relative to the axis under test is vital for accurate measurement. Renishaw has developed the XR20 90° bracket to remove complexity of manufacture for the user. This accessory is manufactured to extremely fine tolerances required to achieve accuracy of testing.

Flexible fixturing options are provided by removable magnetic feet and a variety of through holes for direct bolt attachment. The bracket is useful for meeting the mounting requirements of "off-axis" rotary measurements and resolving "on-axis" mounting difficulties on trunion type machines.

The Renishaw XR20 rotary axis calibrator uses Bluetooth® wireless technology. In some territories the level of regulation varies. This table indicates the relevant standards or licensing authority that XR20 complies with, for indicated territories and the corresponding registration number, where applicable.[183kB]

Hurco set a goal as a company to manufacture the best 5-axis CNC machining centers with the best control and software in the industry. The reason is simple: we determined 5-axis technology would make our customers more profitable. Our 5-axis CNC machining centers, equipped with the integrated Hurco control, are simply the best in the industry. Nobody does 5-axis better than Hurco. And nobody gets you from print to part faster. find out more about Hurco 5-axis CNC Machining Centers

Hurco is known worldwide for our control software, and for conversational or “shop floor” programming, but we don’t often get enough credit for the machine’s...