Product category:
Tooling materials and inserts
News Release from: LMT Fette | Subject: Ball nose and toroidal indexable milling inserts
Edited by the Manufacturingtalk Editorial
Team on 21 August 2007
Milling inserts have integrated cooling
flutes
A range of ball nose and toroidal indexable milling inserts have integrated cooling flutes for through the tool air supply to provide more efficient chip evacuation.
LMT (UK)' latest ball nose and toroidal indexable milling inserts have integrated cooling flutes for through-the-tool air supply to provide more efficient chip evacuation during roughing and semi-finishing cycles The inserts also have an optimised centre geometry that will improve the normally troublesome rest metal cutting area where the tool tends to rub rather than cut at the mid-point of the insert
This article was originally published on Manufacturingtalk on 20 Aug 2008 at 8.00am (UK)
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LMT Kieninger mould and die division's development of the Air-Jet insert range, specifically for dry cutting applications, drew together the following group expertise.
* Fette operation in advanced compacting technology.
* Boehlerit in high precision sintering.
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* Bilz for its tool holding.
As a result, the new inserts are also able to maximise chip removal through a smoother cutting action generated by the helical cutting edge and a positive chip former.
Acting together they generate lower cutting forces.
Available through LMT (UK) of Coventry, UK, the highly accurate direct pressing of the tungsten carbide insert gives far greater toughness, strength and wear resistance.
It requires less grinding in its production and has enabled a variety of different clearance angles to be formed around its periphery.
High accuracy pressing to within +0.025mm tolerance also meets LMT Kieninger's argument that by improving levels of precision during roughing cycles, this brings the finishing cut closer to the final contour requirement.
As a result, the finishing process can be fully optimised and therefore machine utilisation and productivity improved giving greater confidence for running in unmanned or automatic cycles, said LMT.
Three strategically placed radial air feed grooves - set within the sintered form of each insert - help to protect the insert edge by continuously clearing the cutting zone of any swarf generated by the tool.
This gives far greater security on long cycles and especially when running unmanned.
* Dimensions - the ballnose spherical insert is available in diameters of 12mm, 16mm, 20mm, 25mm and 32mm and the toroidal insert in diameters of 10mm, 12mm, 16mm and 20mm.
Both Air-Jet insert types are available in LC 630Q and LC 610Z grades.
The LC 630Q (HC-K30) is a PVD-AICrN high wear resistant coated grade for alloyed and non-alloyed high tensile tool steels up to 54 HRC.
This grade is ideal for medium cutting speed applications under dry machining conditions.
Meanwhile, LC 610Z (HC-K10) is a PVD-TiAIN coated insert produced from a super micrograin carbide substrate that is ideal for high tensile materials, grey, modular and malleable cast irons and also hard machining applications.
* Trial - these inserts were recently used on a machining trial on 312 tool steel, with a 16mm diameter cutter set to 6mm depth of cut at 180m/min with 0.6mm feed/tooth.
Metal removal rate exceeded 100cm3/min, reported LMT.
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