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Linear motor, twin spindle HMC introduced
An
Ex-Cell-O product story
Edited by the Manufacturingtalk editorial team
Jul 1, 2004
With many single-spindle linear motor driven axes machining centres installed worldwide, a machine tool builder introduced its 'third generation' twin-spindle HMC at the METAV exhibition.
With many single-spindle linear motor driven axes machining centres installed worldwide, a machine tool builder introduced its 'third generation' production HMC - a twin -spindle machine - at the METAV show in Germany recently.
Based on its success with linear motor driven axes horizontal machining centres, first introduced in 1993, Ex-Cell-O unveiled its 'third generation' linear motor XHC 242 twin-spindle HMC at the recent METAV show held in Duesseldorf, Germany.
The XHC 242 makes use of Ex-Cell-O's modular build concepts so that HMCs can be tailored to user needs.
As shown at METAV, the XHC 242 was intended for high productivity metal-cutting of cubic workpieces with emphasis on reduction in investment costs and high availability for the automotive OEM and supplier industries.
Individual compensation of X, Y and Z axes for each spindle, without any mechanical coupling, allows full independent operation and workpiece error compensation is covered separately by the CNC for each spindle and set-up.
The machine bed is of welded construction and linear motors are applied to each axis travel.
To achieve a stiff spindle construction Ex-Cell-O uses a slide rest with cross and top slides for the X-axis.
Direct absolute measurement systems are used on X, Y and Z-axis.
The NC rotary table can be programmed in increments of 0.001 deg, for which the B-axis is directly driven and equipped with an angle-measurement system.
Each HSK-63 main spindle has a speed range up to 16,000 rev/min and is equipped with vibration and temperature monitors.
There are also connections for cooling systems to maintain spindle temperatures at a constant level.
Machining envelope is 630mm and 800mm in X/Y and Z and a tool magazine is mounted over the spindles with a capacity for 60 tools.
Chip-to-chip toolchange time is 2.6 sec.
In designing the machine, Ex-Cell-O has paid particular attention to the removal of fine chips when 'dry' or minimum lubricant machining.
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