Product category:
Sawing and cutting-off machines and automation systems
News Release from: Kasto | Subject: Kasto KASTOtec Ac7 bandsawing machine
Edited by the Manufacturingtalk Editorial
Team on 22 December 2003
Carbide tipped blades bandsaw three
times faster
Bandsawing machine is designed to cut rounds up to 730 mm diameter, or rectangular material to 800 x 730mm, at up to three times faster than with conventional bimetal blades.
A new bandsawing machine has been introduced by Kasto, Germany, designed for efficient cutting of rounds up to 730 mm diameter or rectangular material to 800 x 730mm Called KASTOtec Ac7, the machine uses tungsten carbide tipped (TCT) blades although a version of the machine is also available, designated A7, which uses bimetal blades
This article was originally published on Manufacturingtalk on 23 May 2001 at 8.00am (UK)
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The Ac7 is now the largest model in the manufacturer's purpose-built carbide cutting bandsaw range, which until now comprised Ac3, Ac4 and Ac5.
There are, however, some machines with bigger capacities than the Ac7 in Kasto's main product programme that are sufficiently rigid and powerful to extract meaningful productivity from TCT blades.
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Manufacturers and stockholders are increasingly adopting carbide technology as they become aware that all types of material from aerospace alloys to steel cut be cut three times faster than with conventional bimetal blades, so cost per cut can be reduced considerably.
The saw head contains polymer concrete to dampen vibrations and reduce noise, and has twin column guides with linear slides on the ways to prevent stick-slip.
A novel feature is incorporated whereby, at the end of a cut, the bar retracts slightly and the blade displaces in the opposite direction to avoid damaging the carbide tips during blade return.
This has the additional advantage of protecting the surface finish of the sawn faces.
Driven by a powerful, 18kW motor, the 9 metres long by 1.6mm thick blade is available in three widths - 54, 67 and 80mm - to suit different applications.
Kasto works closely with the major blade manufacturers to optimise TCT bandsaw design.
Material feed in a single stroke is 750mm, or optionally 3 metres, and is activated by a ballscrew under NC control to ensure accuracy of cut length.
Regardless of whether single bars or bundles are being cut, the minimum rest piece length of 50mm ensures minimal wasted stock.
Installed weight of the machine is nearly 10 tonnes, giving an indication of the robustness of build.
An extensive variety of material handling options is available from simple roller conveyors to fully automated storage and retrieval systems.
Noteworthy is the high level of sawing 'knowledge' built into the control which, together with the intuitive operator interface, allows even novice users to extract the best performance from the machine after a short learning curve.
Up to 98 orders may be entered comprising cut length, number of pieces, size and shape of material, and cutting parameters.
The control automatically selects the in-feed rate and band speed up to 180 m/min to suit the material being cut, avoiding blunting the blade and/or ruining the part.
When entering and exiting a cut, parameters are backed off to protect the sensitive carbide tips.
During the cycle, load sensors on the hydraulics detect when the blade is not engaging the full width of the material and increases the in-feed up to 130% of the programmed speed.
All parameters may be over-ridden by an experienced operator.
Even when the machine is operating unattended, monitoring of blade deviation, coolant flow and other functions prevents the cutting of scrap.
All sensors are separated from the working area to avoid contamination.
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