Indentec indenter allows GKN to test outside joint
A
Zwick Roell product story
Edited by the Engineeringtalk editorial team
Sep 22, 2009
Indentec's nose-mounted indenter enables hardness tests to be performed inside hollow enclosures, bores and tubes.
Combined with a component-clamping fixture, operators are able to test in exactly the right position.
Internal surface of GKN CV joint being tested with Indentec\'s hardness tester
Prior to buying two Indentec 4150 SK Rockwell hardness testers, GKN Driveline were cutting the CV joint in half to allow access to the test point.
The solution provided by Indentec removes this operation and enables tests to be performed immediately after the component leaves the heat-treatment furnace.
The Indentec ZHV30 micro and macro Vickers hardness testers are used to check the hardened case depth of the CV joint.
The component is first cut in half and polished to a high quality before mounting into a support fixture that ensures the part is securely held in place during the application of the Vickers test force.
The instrument is supplied with an XY table fitted with high-accuracy micrometers, each with 50mm of travel.
The hardened case of the CV joint has a precisely defined profile to ensure optimum performance.
The Indentec system provides a fast and accurate means of verifying the integrity of the hardened layer.
A CCD camera and automatic indentation measurement software was supplied to reduce uncertainty associated with manual measurement and increase the accuracy of the result.
Vickers impressions are now measured in less than 1sec.
The Rockwell and Vickers instruments were manufactured in accordance with Indentec's UKAS accredited ISO 17025:2005 Quality Assurance system and calibrated to the relevant ISO and ASTM standards, providing direct traceability to National Metrology Institutes such as NIST, PTB and IMGC.
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