BMI turns to Keyence IM Series

BMI Engineering, a UK high-volume turned-parts manufacturer, has upgraded its quality department with the addition of an IM Series image dimension measuring system from Keyence. The system has not only saved time spent using laborious shadowgraph technology, but has also negated any potential for customer disputes regarding dimension measurement.

Based at Halesowen in the West Midlands, BMI Engineering is today a rare breed of UK manufacturer. In an era when most volume machining takes place in low-cost economies in the Far East, BMI is bucking the trend. With 26 multi-spindle automatic lathes on site and five CNC turning centres, the company is a UK leader in the supply of repeat turned parts, predominantly to the automotive sector, but also to industries such as gas fitting, heating, plumbing, railway and agriculture.

Chris Peare, Quality Manager at BMI Engineering states: "Acquiring the Keyence IM was part of moving our quality effort forward. We manufacture turned parts for numerous automotive tier one supply chain companies and one or two were nudging us in the direction of more automatic measurement capability."

BMI, a 30-employee company first established in 1975, was previously using time-consuming shadowgraph technology to measure its parts, a process not befitting the fast-paced markets that the company served.

Mr Peare says: "If we measure a turned part on the IM, and it's correct, the customer has no come-back whatsoever. Each measurement is recorded and documented, and can be repeated time after time. Furthermore, it's no problem if the customer wants full PPAP (production part approval process), CpK or SPC. We simply print off the required graphs and information ready to send with the other paperwork metrics. All of this is invaluable to a company such as ours as we export around 65 per cent of our output."

When mulling over the idea of an image measurement system, Mr Peare received, by chance, a mailshot regarding the Keyence IM Series. After expressing his interest, Keyence visited BMI and performed a demonstration. Suitably impressed, the IM was installed in September 2013.

BMI works to typical tolerances of +/-0.025mm and performs random sample inspections. Turned automotive parts produced on the company's multi-spindle automatics, along with other components such as plugs (headed and recessed), pipe fittings and special fasteners, measure up to 57mm diameter, while parts produced on the turning centres can be larger, up to 80mm. Maximum length is around 120mm. According to Mr Peare, long parts are no problem for the IM Series thanks to Keyence's image stitching technology.

Typical features on parts such as plug-type adaptors and fluid fittings include undercuts and threads. The measurement of threads is particularly tricky for many technologies and, as a result, most machine shops prefer to use gauges. However, this is not the case where a Keyence IM Series is installed.

Mr Peare says: "We can checks thread flanks and pitches - metric and imperial - with no problem whatsoever. In fact, we even use the IM to check our thread gauges."

Loading multiple parts

The ability to load multiple parts on the IM Series is also seen as a huge advantage to this ISO9001-accredited business, where many of the turned components are relatively small. It's not unusual for the quality department to load up to six parts simultaneously on the IM. Needless to say, this presents considerable time savings.

The IM Series image dimension measurement system reliably measures features almost instantaneously. Simply place a target on the stage and press the button. Up to 99 geometries are measured in a matter of seconds with a repeatability of +/-1 micron. Targets are found and measured regardless of their position or orientation, and there is no risk of measurements being affected by variations in operator skill levels. Thanks to the Keyence iPASS shape detection method, the system determines the position and angle of targets, making measurements fully automatic.

Beyond the quality department, the benefits of the Keyence IM extend to the shop floor. For instance, if a machine setter is struggling with a particular thread, the IM will reveal in an instant what is wrong so that the variation can be quickly identified on the multi-spindle automatic. Compare this with performing laborious point-to-point measurement on a shadowgraph, and the savings in downtime are clear to see.

Mr Peare concludes: "Since it was installed the IM Series has been kept extremely busy, there's always someone on the machine. Thankfully, it's been extremely reliable and helped take our measurement capability to the next level."

For more information about the IM Series image dimension measuring system from Keyence please visit www.keyence.co.uk/prbmi.

Keyence (UK) Ltd

Altius House
1 North Fourth Street
MILTON KEYNES
MK9 1DG
UNITED KINGDOM

+44 (0) 1908 696900

ukinfo@keyence.co.uk

www.keyence.co.uk

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