High-Performance Lathe
Four models of EMCO’s Maxxturn 45 lathe offer various tailstock, counter spindle, axis, and tool options for producing complex turned and milled parts 4.72 inches (120 mm) long that weigh up to 4.4 pounds (2 kg).
Posted: July 6, 2020
Like the other machines in the Maxxturn lathe lineup, the Y axis on the Maxxturn 45 from EMCO Corp. (Wixom, MI) is integrated in the machine’s body at a 90-angle to the X axis to maximize stability and precision. The extremely wide distances between the guides make for stable turning and offer the operator additional possibilities for complete machining.
The compact counter spindle takes over workpieces position-oriented and with utmost precision for machining the reverse side. This avoids having to clamp workpieces a second time, thereby avoiding wait time, which in turn increases productivity and makes for shorter part delivery periods.
The tool turret with single-motor engineering offers space for 12 VDI25 tool holders. Each station can accept driven tools. A servo motor powers the driven tools and the swivel movement, respectively. Equipped with EMCO joggling plates, the toolholders allow easy insertion with repeatable accuracy without time-consuming adjustments.
The 72-degree welded-steel inclined bed provides higher rigidity and superior thermal behavior during warmup compared to a casting. The base is filled with special material to dampen vibrations and resonances. Reinforcing materials provide additional rigidity in zones subject to intense stress.
Delivered with highest possible pre-stress and are bolted onto high-precision, ground-bearing pads, roller guides are free from wear and bedded without play. Perfect guidance qualities without any stick-slip effect guarantee best surface qualities. Covers along the guides and stainless steel telescope covers increase operational safety and durability.
The high driving power of the spindle combined with optimal torque curve ensures economic efficiency in cutting steel and high-speed cutting of aluminum. The main spindle guarantees a bar capacity of up to 45 mm and is supported with extra-large precision bearings. These allow for a wide range of speeds with extremely good running truth. Symmetrical headstock with fitted cooling fins ensures optimum thermostability.
Equipped with EMCO’s joggling plate and DIN 5480 coupling, the toolholder allows easy insertion with repeatable accuracy without time-consuming adjustments. It consists of a 12-position VDI25 radial turret with single-motor engineering and quick-change system. All 12 stations accept driven toolholders. A servo motor powers the driven tools and the swivel movement, respectively. The operator adjusts slewing speed at any time using a feed-override switch. The turret can be used on both spindles and always takes the shortest way when swiveling to the next tool. A central coolant supply through the VDI interface at the turret and through the toolholder optimizes cooling and lubrication; another coolant pipe cleans the clamping devices and work area.
The C axis/main spindle (model-specific) is standard and can be positioned with a resolution of 0.001 degrees. Attached no-contact rotary encoder without a belt drive guarantees precision as well as precise contour milling. The main spindle can be clipped into position for drilling and milling operations using a spindle brake.
Highly dynamic three-phase drives in all linear axes, with preloaded circulating ball spindles, provide high feed forces and positioning with repeatable accuracy. Incremental measure systems in the feed motor are integrated in all linear axes.
The clamping unit is a hydraulic system with a bar capacity of ø 45 mm, including a programmable chuck stroke monitor and direct measure system. Time-consuming adjustments with the tools are thereby substituted by simple training in Teach-In-Mode.
The compact, high-pressure hydraulic system with a pump and a fine filter in the head pipe, with which the chucking pressure can be more finely adjusted, is an absolute must for clamping sensitive work-pieces in the main and counter spindles.
Optional pneumatically operated pickup unit removes finished parts from the main or the counter spindle. The parts are gently transported into a finished parts container outside of the work area. Max. length of finished parts: 120 mm; max. ø 45 mm; max. weight: 2 kg.
A digital process assistant that integrates customer-, project- and system-specific control applications, EMCONNECT networks the entire production chain. Users can access all important details, data, and systems directly and centrally at the machine. The range of apps is continuously being expanded. The brand-agnostic Option Shopfloor Data app, for example, enables anyone with a smartphone or tablet PC to monitor all machines as well as production flow. To minimize downtime, the company is developing the EMCONNECT Data Service for targeted preventive maintenance.
