XYZ Machine Tools is helping Handicare to maintain the accuracy, rigidity and quality of its stairlifts by machining the mating surfaces of its tubular components using an XYZ RMX 3500 bed mill for straight sections and an XYZ RMX 4000 bed mill for curved sections.

Among Handicare’s UK manufacturing facilities is its Kingswinford, Birmingham plant, where the company designs and manufactures straight and curved stairlifts, producing more than 50 every day. The key element of each stairlift is a pair of tubular runners with welded gear racks. These support the seat and, with its pinion drive and rollers, allow it to transport the user smoothly and safely between floors.

Nabil Mohamed, production engineer at Handicare, says: “For straight stairlift sections, the tubes and gear racks are welded together by  a robot and cut to length. We leave an excess of 0.5 mm which we machine off using the XYZ RMX 3500. This process ensures that the gear profile on the rack is perfect when we join the tubes.”

The XYZ RMX 3500 is dedicated to straight sections and has a set of fixtures on the bed, each designed to lock into the gear profiles and position the tube in the exact position required to mill across the end and generate an accurate gear profile and tube length. The open design of the bed mill makes it possible to work with long tube sections that overhang the bed.

For curved profile stairlifts, the process is similar with tube sections machined on the XYZ RMX 4000. This machine has a larger bed of 1474 x 355 mm and fixtures loaded to suit the end-machining of curved sections.

For further information www.xyzmachinetools.com