Product category:
Vertical machining centres (VMC)
News Release from: Geo Kingsbury Machine Tools | Subject: Optional automatic tailstock, C 30 U, C 40 U
Edited by the Manufacturingtalk Editorial
Team on 09 July 2008
Hermle VMCs can have automatic tailstock
For carrying out 'one hit', 4-/5-axis machining of long workpieces, Hermle has introduced an optional automatic tailstock for its C 30 U and C 40 U vertical machining centres.
For carrying out 'one hit', 4-/5-axis machining of long workpieces that have to be supported at both ends, Hermle has introduced an optional automatic tailstock for its C 30 U and C 40 U vertical machining centres The tailstock clamps onto the trunnion of the VMCs alongside the machines' 360-deg rotary table
This article was originally published on Manufacturingtalk on 4 Jul 2008 at 8.00am (UK)
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* NC positions tailstock - NC command will position the tailstock automatically in two axes.
A long workpiece held between centres can now be machined in a single cycle and without manual intervention.
The operation can be followed by machining on the fifth side (unclamped end) after automatic removal of the rotating centre.
Removal of the tailstock is achieved by retracting it using the 220mm stroke of twin linear slides on which the centre moves.
The slide assembly is then swivelled downwards through 90 deg to allow the VMC's cutter to access the end of the component.
In the latter mode, normal 5-axis simultaneous machining or 5-sided machining can be performed on shorter, self-supporting billets, castings or forgings, said Hermle.
* Unattended operation - using Hermle's HS 30 robotic handling system for loading and unloading workpieces automatically, long periods of unattended operation are achievable, whether using 5-axis machining, 4-axis machining with tailstock, or a combination of the two.
Features of the C 30 U and C 40 U vertical machining centres include the following.
* Heidenhain iTNC 530 or Siemens S 840 D CNC system.
* Three staggered Y-axis guideways for stability.
* Swivelling of the trunnion +/-115 deg.
* Mineral casting bed that promotes vibration-free machining, particularly as the bearings for the trunnion are set directly into cast holes in the sides of the bed.
Sole UK agent for Hermle, Geo Kingsbury Machine Tools, told manufacturingtalk that turbine blades, medical parts, cutting tools and toolholders are typical examples of components machined using the tailstock.
Components can be up to a maximum length of 420mm and their manufacture is speeded and simplified with this arrangement, said Kingsbury.
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