Product category:
Milling cutters
News Release from: Stellram | Subject: Indexable Button Inserts for milling
Edited by the Manufacturingtalk Editorial
Team on 10 March 2004
Button inserts semi- and finish-mill
mould steels
Button inserts for rough, semi-finish and finish milling of mould and tool steels are also suitable for other demanding applications where high metal removal rates are required.
A new button insert from Stellram for rough, semi-finish and finish milling of mould and tool steels will make its first appearance in the UK at MACH 2004 It is also suitable for other demanding applications where high metal removal rates are required, such as machining turbine blades
This article was originally published on Manufacturingtalk on 21 Mar 2001 at 8.00am (UK)
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Three-in-one cutter boosts milling effectiveness
Combining three milling functions into one cutter reduces tooling inventory costs and simplifies programming when machining cast irons, steels, and ferrous and non-ferrous alloys.
Securing higher performance in milling
High productivity and security is offered by the Stellram 7702 multi-functional tooling intended for mould and die machining and milling operations in the aerospace and automotive industries.
The new insert design, which is available in a variety of coated and uncoated carbide grades, features a patented, anti-rotation system that allows maximum stability and vibration resistance for machining tough materials at high metal removal rates.
The rigid fixation system promotes extended tool life.
Up to eight effective cutting edges are available around the circumference of the insert, according to the application.
Further reading
Turning tools are dedicated to precision parts
Complex internal and external cylindrical profiles, as well as single-point threading and grooving, are generated by Stellram's wide range of Posimatic inserts and tools.
Mini tooling grooves, threads and bores
Stellram's Ultra-mini programme, consists of replaceable carbide tools that locate in a common steel shank. The tools cover application ranges for grooving, threading and boring in small parts.
The inserts are housed in Stellram's high precision shell mill bodies - 7712VRD and 7710VR - which incorporate a new pocket design to accommodate them, ensuring efficient swarf evacuation.
These new inserts can also be used in existing 7700VR and 7702VRD style tools.
Insert diameter for the former body is either 12 mm or 16 mm and the tool is meant for mould/tool/die production.
As-machined surface finish is said to be high, reducing the amount of subsequent hand finishing of the tool.
Only 12 mm diameter inserts are available for the 7710VR cutter, however, which is intended for turbine blade applications.
Two test reports have been published comparing the performance of the latter when roughing stainless steel turbine blades.
In the first, involving ST12T steel, a four-insert Stellram cutter of 40mm diameter taking a 2mm depth of cut at 3182mm/min using a cutting speed of 200m/min produced 28 components, nearly double the competitive cutter which achieved only 15.
The second test, on a X20CR13 stainless steel blade (hardness up to 950Rm), also resulted in a doubling of component production, from one to two.
The cutter in this case was a six-insert model of nominal diameter 66mm.
Cutting speed was almost identical at 280m/min for the Stellram tool and 260m/min for the other product.
The big difference was that not only was production output doubled, but productivity was increased too.
By using a much higher feedrate with the Stellram cutter - 4050mm/min as opposed to 1497 - albeit the depth of cut was 2.5mm whereas the competitive tool took 5mm cuts, the overall machining cycle time was reduced by more than a quarter.
MACH 2004 - April 19-23 - NEC Birmingham, UK.
Hall: 5, Stand 5579. Request a free brochure from Stellram ...
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