Product category:
Miscellaneous machine tools, gear cutting machines and equipment
News Release from: CTL Centreline | Subject: Double-sided right-angle milling heads
Edited by the Manufacturingtalk Editorial
Team on 28 April 2003
Special milling heads double thread die
output
Special double-sided right-angle heads are able to mill a pair of flat thread rolling dies simultaneously on any of six Cincinnati Arrow VMCs instead of machining singly as before on HMCs
Staffordshire, UK-based Mayes and Warwick is able to mill a pair of flat thread rolling dies simultaneously on any of its six Cincinnati Arrow vertical machining centres (VMCs) using double-sided right-angle heads from CTL-Centreline, rather than having to manufacture the dies singly on more expensive horizontal machining centres Used for the production of machine screws and self-tapping screws as well as knurled and grooved components, the dies are made from D2-type tool steel, high-speed steels such as M42 and sintered steels
This article was originally published on Manufacturingtalk on 27 Jun 2005 at 8.00am (UK)
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Two right-angle heads - one for milling-intensive work and the other for drilling and tapping - can be exchanged automatically from a machining centre's tool magazine.
Some can be as large as 350mm long by 75mm wide and contain a deep thread requiring heavy milling.
Said quality and technical manager, Phil Ashford, "This a tough metalcutting application and it takes several hours to machine a single die.
Economic manufacture therefore relies on 24-hour operation, so we need to be confident that the heads will be reliable, particularly through the unattended night shift." Another advantage of putting the work on a VMC is that some conventional vertical milling is often needed, mainly on the die edges, before the threads are cut using the special thread form mills.
Both operations may therefore be performed sequentially on the same machine.
Each 1:1 ratio, BT40-taper angle head is used at fairly low speeds, normally between 50 and 100 rpm; and the fact that two components are machined simultaneously balances the bending moments on the head.
Nevertheless, the stress that the angle heads are continually under means that they have to be returned to Centreline for periodic refurbishment.
Ashford points out that in this respect, there is an advantage sourcing such products from a British manufacturer.
Mayes and Warwick located in Burntwood, is a family-owned business formed in 1915.
It specialises in flat dies but also manufactures special form dies as well as cylindrical and planetary dies.
The company's transition to the new ISO 9001:2000 quality standard will be completed in 2003.
In some instances customers require only one die, in which case Mayes and Warwick uses one of its CTL-Centreline single-sided right-angle milling heads on a VMC to fulfil the order.
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