Product category:
CNC lathes
News Release from: HK Technologies | Subject: Maxxturn 25 high-performance universal lathe
Edited by the Manufacturingtalk Editorial
Team on 12 November 2007
Small CNC lathe has Y-axis and
sub-spindle
For the complete machining of small parts, in batches of 50 to 5,000-off, a high performance, competitively priced universal lathe has a Y-axis and a sub-spindle.
Emco in Austria said about its Maxxturn 25 high-performance universal lathe that it is the first time that such a compact machine has been equipped with a Y-axis and a sub-spindle Emco said that the machine suits the complete machining of small parts
This article was originally published on Manufacturingtalk on 12 Sep 2002 at 8.00am (UK)
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Emco added that the Maxxturn 25 is particularly interesting for smaller suppliers or subcontracting firms, who need to machine at a highly competitive price.
Introduced at EMO 2007, the MAXXURN 25 can be used for many applications ranging from the production of hydraulic components to parts for timepieces and jewelry.
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It performs complete machining of bar stock parts of up to 25mm diameter and chuck parts up to 85mm diameter.
Most manufacturers, said Emco, employ this machine segment for machining bar stock parts starting with a diameter of 45mm.
Emco claims that the Maxxturn 25 is the first 25mm bar capacity lathe to allow complete machining.
The machine is offered at what Emco claims to be an 'unbeatable price-performance ratio'.
The Maxxturn 25 has a compact counter- or sub-spindle, which can take over position-orientated workpieces for the prcise machining the reverse side.
Emco said that this feature eliminates a second clamping step, reduces doen-time and so increases productivity.
Additional technical features are as follows.
* The Maxxturn 25 can be configured either with tailstock or counter spindle or alternatively with or without Y-axis.
* The turret with hydraulic lock offers space for up to twelve VDI16 tool holders.
* With a total of 36 switch positions, the number of cutting edges may be increased up to 42.
* The driven tools and the c-axis are already included in the standard model.
* Like in all bigger models of the same range, the Y-axis of the Maxxturn 25 is fully integrated in the body of the machine, ensuring maximum stability as well as utmost precision of all parts manufactured.
* The extremely wide distances between the guides make for stable turning and even offer the user additional possibilities for complete machining.
* In the course of modular assembly customers can choose between a Siemens control interface (including the popular ShopTurn dialogue interface) or a FANUC control interface (featuring the equally popular Manual-Guide-i interface).
Technical details/Concept of the machine are as follows.
* Machine base - the machine has a 60 deg inclined bed.
The extremely rigid and compact cast-iron design provides the basis for this robust and precise lathe.
Heavy duty reinforcing ribs provide additional rigidity in zones that are subject to intense stress.
All guides are crafted as preloaded cross-roller guideways.
They are screwed onto bearing surfaces that have been precisely ground, with additional wedges that brace them against a plane of reference which is also ground.
Covers along the guides as well as additional telescope covers made of stainless steel increase operational safety and durability.
* Main spindle - the high driving power of the spindle combined with optimal torque curve ensures economic efficiency in cutting steel, as well as high-speed cutting of aluminum.
The main spindle which is pivoted with a sizeable precision bearing allows for a wide range of speeds with extremely good running truth.
A nearly symmetrical headstock with a large cooling surface ensures optimal thermostability.
* Tailstock - on the Maxxturn 25 with tailstock, the tailstock is set up on the linear roller slide and can be positioned automatically within a range of 360mm.
The rolling centre with MK3 shaft is directly integrated into the tailstock and can be removed using a pressure wedge.
* Counter spindle - on the Maxxturn 25 S, which is equipped with a counter spindle, the counter spindle headstock is placed on a separate linear roller slide and can be positioned within a range of 360mm.
A stroke-monitored parts ejector, flushed with coolant, ensures safe removal of the finished parts.
* Tool turret - a 12-position VDI16 disc turret has 36 indexed positions and servo technology.
A servo motor powers the driven tools and the swivel movement, respectively.
The machine operator may adjust the slewing speed at any time, using a feed-override switch.
The turret switches with direction logic.
This means that it always takes the shortest way when swiveling to the next tool.
Tool holders complying with VDI 69 880 allow easy tool insertion with repeatable accuracy without time-consuming adjustments.
* C-axis/main spindle (model-specific) - the C-axis is part of the machine's standard equipment.
The spindle can be positioned with a resolution of 0.001 deg.
A directly attached rotary encoder, which is no-contact and without a belt drive ensures the precision of the c-axis as well as precise contour milling.
In addition, the main spindle can be clipped into the right position for drilling and milling operations using a spindle brake.
* Y-axis (model-specific) - the Y-axis is integrated in the standard build of the machine and is positioned at an angle of 45 deg in relation to the X-axis.
Extremely short protruding lengths are the basis for solid lathing and drilling operations as well as for milling without receiving imprecise contours.
* Feed drive - highly dynamic three-phase drives in all linear axes with preloaded circulating ball spindles provide high feed forces and positioning with repeatable accuracy.
* Measure system - incremental measure systems in the feed motor are integrated in all linear axes.
Positioning variation according to VDI3441 in X/Y/Z: 0.0035/0.003/0.004mm.
* Clamping unit - he clamping unit is a hydraulic clamping system with a bar capacity of up to 25mm diameter including chuck stroke monitor.
Either a pull-back or push-back collet chuck may be attached to the main spindle as well as a three-jaw power-operated lathe chuck.
The counter spindle provides space for a pull-back or push-back collet chuck.
* Lubrication - the Maxxturn 25 uses an automatic centralized lubrication system with lubricant-saving impulse lubrication due to its integrated pressure and quantity monitoring.
* Coolant system - a central coolant supply through the VDI interface at the turret and through the tool holder ensures optimal cooling and lubrication during the machining process.
An additional coolant pipe is installed to clean the clamping devices and the work area.
* Hydraulic system - the hydraulic system is a high-pressure compact hydraulic system with a pump and a fine filter in the head pipe, with which the chucking pressure can be more finely adjusted, a precondition for clamping sensitive work-pieces in the main and the counter spindle.
Thanks to its compact construction it only has a small footprint.
* Housing - the machine housing is completely closed.
Its door is monitored with safety switches to prevent operator injury and features a sizeable viewing window made of laminated safety glass.
* Finished parts pick-up unit (optional) - the pneumatically operated pick-up unit removes finished parts from the main or the counter spindle.
Thus, the parts are gently put into a finished parts container outside the work area.
Maximum length of finished parts is 120mm; maximum diameter is 25.5 mm and maximum weight is 0.5kg.
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