Product category:
Automation and assembly equipment
News Release from: Quality Gauging Systems | Subject: Rotary screws for turbochargers
Edited by the Manufacturingtalk Editorial
Team on 19 April 2005
Fixture enables precise rotor matching
Manufacturer of rotary screws is using a bespoke measuring fixture with data analysis and capture, as a pair of rotors must be exactly geometrically matched, in order to mesh together perfectly.
Rochdale, UK-based Holroyd Machine Tools, is using a bespoke measuring fixture with DataMyte data analysis and capture, supplied and supported by Quality Gauging Systems, in the manufacture of rotary screws Holroyd, which employs over 200 staff, is a world leader in the manufacture of helical components, with prestige clients such as United Technologies, Pratt and Witney and Boeing
This article was originally published on Manufacturingtalk on 23 Jul 2007 at 8.00am (UK)
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The Rochdale site operates three measurement benches from QGS, the latest of which has been designed to measure the shafts of rotary screws for the turbocharger units used in marine outboard power motors - a critical task in the production process.
This project, for the annual manufacture of 15,000 matched pairs of rotors, measures shaft diameter, length and root depth for each of these very technical components.
To work at maximum efficiency each pair of rotors must be exactly geometrically matched, in order to mesh together perfectly when in operation.
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Manufacturing tolerances on the components are in accordance with automotive capability requirements, therefore measurements are taken mid-process, in order to fine tune the geometry of each pair.
In order to take the required measurements, Quality Gauging Systems manufactured a bespoke measuring bench, incorporating fixtures to hold the components in place.
When the item is correctly positioned, the measuring tools, in this case touch sensitive callipers with electronic transducers, are manually moved into place.
The selected measurements are then taken and automatically transmitted to the DataMyte software which is running on the bench-top PC, for analysis.
The information analysed by the DataMyte software includes traceability.
As each component is measured the display automatically indicates whether it is well within, just within, or outside acceptable tolerances, using a diagram with easily understood green, amber or red coloration.
During the whole process the DataMyte software is continuously analysing the new measurement data in the context of the total manufacturing run, and displaying the overall capability factor of the process on screen.
This enables managers and supervisors to keep an accurate check on quality at all times.
The manufacturing process of these rotors is an example of a truly international supply chain, with the stainless steel shafts being made in Canada, from where they are sent to Japan for the aluminium diecast to be added, then on to Holroyd in Rochdale, before being shipped back as finished units to the USA.
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