Product category:
Materials testing equipment
News Release from: Indentec Hardness Testing Machines | Subject: Turbine hub tester
Edited by the Engineeringtalk Editorial
Team on 25 November 2002
Hardness tester takes on big turbine
hubs
A special system from Indentec enables the hardnesses of large, heavy turbine hubs to be determined quickly and repeatedly with minimal manual handling.
A special system from Indentec enables the hardnesses of large, heavy turbine hubs to be determined quickly and repeatedly with minimal manual handling Designed for hubs up to 1000mm in diameter and weighing 30kg and more, the system consists of a dual scale digital tester fitted with a Y-frame table that can be adjusted to give stable three-point support to each hub during testing
This article was originally published on Engineeringtalk on 21 Aug 2002 at 8.00am (UK)
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Hardness testing fixture holds the lot
No fewer than 19 different specimens can be supported for hardness testing by a single fixture developed by Indentec.
Brinell tests are made on the hub at points near the firtree fixings for the turbine blades.
When the point has been selected, the system positively locates the hub beneath the nose-mounted indenter.
After the test, the indenter is retracted so that the image of the impression can be transmitted by a fixed high-resolution camera to a monitor, where the diameter is measured to establish the hardness.
The reading is then downloaded to a printer along with related data.
The system uses Brinell testing with a 1mm diameter ball and 30kgf test load because the process minimises the risk of significant stress points close to the firtree fixings.
However, it can also be employed for Vickers testing using a diamond indenter and registering the impression on the same monitor.
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